The world record of underwater holding of breath can reach more than 20 minutes, but while the movement will hold the breath, will greatly consume oxygen in the body, at most can only last for two or three minutes, plus the air in the helmet, Yu Yifeng will persist for up to five minutes.

The five-minute countdown rang in the heart...must be done as soon as possible!

Through this door, it is simply the hardest hit area of nanorobots, and for a while, all kinds of green markings are densely labeled as soybeans on the ground, like a layer of seaweed carpet, and this layer of carpet is expanding.

It may be that the metal elements here, which provide them with a rich material, will expand so quickly.

If the scalp of Yifeng is tingled, if there is no "Ling" to mark these robots, he can only give up this action.

Maybe... it’s broken down when you go in!

Now it just takes some risks, he can only unconditionally believe "Ling", has marked everything out.

It was too late to hesitate, and Yi Feng's heart was crossed, and his body slowly swam through.After the power armor is taken off, of course, it is also beneficial to feel the water flow, and the whole body is much more flexible.

But such intense exercise, let the air in the helmet leak out, consumes, and quickly consumes most of it.

After tremblingly avoiding the algae markings at the door of this pile, a metal floor was stepped on the foot, and Yu Yifeng quickly resisted a machine with an electromagnetic rifle and pulled the finger.“The bang!”At once, a nearby instrument was rotten.

Destruction is always easier than creation, and for these high-precision devices, it is impossible to completely defend against human high-speed bullets.

The huge recoil of the gun made his whole body crooked and almost came into contact with a green algae group.

In an instant, he once again aroused a cold sweat behind his back, and he quickly stabilized his body.You know... there are nano-robots wrapped in it!

The pounding heart is increasing its oxygen consumption, and even if it is soaked in seawater, he really sweats on his own.However, he could not control this physiological response at all, but only speed up the speed in his hands.

“It’s fucking dangerous!”

Nanorobots are not reasonable.

As soon as it comes into contact with human cells, it will forcibly extract certain metal elements inside as a self-replicating nutrient.Do not think that human cells have no metal elements, calcium, sodium, potassium, magnesium, iron basically every cell, the lack of any one, human cells will die.

If the infinite replica of the nano-robot is used to destroy the world, it is definitely more simple and effective than the retention of nuclear bombs, and there will be no life left.

It's anything!

This kind of disaster, in some science fiction novels, is called "gray tide", and he did not expect to be able to witness it himself... nor do he know whether these things can be copied infinitely.

Yu Yifeng could not help but scold and scold in his heart, and suctioned the last breath of air in the helmet.

“The last three minutes...”

He broke the instruments one by one, cut out some small chip-like things with the laser cutting tool he carried, and could not distinguish what was really it, and threw it directly into the helmet.

The flashlight irradiated around, suddenly saw an elevator facility, it seems that the laboratory should still have underground space!

But apart from the elevator, no other entrances and exits were found... The elevator seemed to be running out of power.

There is no defense mechanism in the laboratory, and perhaps some circuits are destroyed by nanobots.

Looking back, these green groups are spreading rapidly at the speed that is visible to the naked eye!In such a moment, it occupied most of the laboratory, and the east and west were everywhere.

Yu Yifeng gritted his teeth again and spat out a lot of cloudy bubbles, this quiet, like a large hand of a shadow, slowly strangled his throat.

Here is the bottom of the water, the action is very inconvenient, dark and small space, the only light is the helmet and the outside submarine issued...

Claustrophobic, lack of oxygen, the fear of death is affecting the innermost mood, he feels that the mind is a little faint, instinctively want to breathe, which is a huge manifestation of psychological pressure.

“As soon as possible, in two minutes...”

At this time, he heard a soft sound outside, it should be the oxygen bottle of the power armor, and the heart shouted again, this explosion will certainly spread the nano-robot everywhere.

But at this time, he could not think so much, he re-sedated his mind, turned and swam over a radar-like thing.

This thing is about a meter high, and it feels very important.

Yu Yifeng shot a few shots against the bottom of the radar, and then cut it down directly with the cutting tool, and was suddenly surprised.

“Very heavy!”

“One more minute!”

If you take this thing with you, you will definitely not swim!What to do?

His heart was in a hurry, but at this time, he suddenly heard the exclamation of Zhao Yao and others, and it seemed that something had happened outside.

“Come on, Captain, get out of here!”

“Green...green!”

“Come out!The speed is about to be surrounded!”

These sounds spread through the broadcast of Power A, in the water, sounding a strange sensation of “bum.”

But where Yi Feng still does not understand what happened, the clump of nano-robots at the entrance of the passageway is about to close the exit!

At this moment, he also dared not hesitate to force this radar.Good guy, count the buoyancy of the water, enough for one or two hundred pounds!

“No swimming!”This time the intense exercise increased the consumption of oxygen, he felt that the darkness of the large area in front of him was a precursor to a large lack of oxygen.

If you take it, you can't escape!

“Come on, Captain, hurry up!”

“Hurry up!”

In this extremely dangerous situation, the adrenaline rush of Yi Feng's body, he forced himself to sink his mind and face a huge choice...

First, drop this radar, yourself alone to swim out, after all, the helmet inside has been harvested!

Second, search for the entrance to the space below, and then find a way out, this may be an opportunity... what is not good to say in the isolation layer below, and even air may be!

Yu Yifeng's forehead jumped straight, a face is green, I don't know whether it is because of suffocation or some other reason.The elevator is not undone, it must be no longer available, where is the entrance, has been blocked by nanobots?

In front of him, a large area of darkness, he jerked his tongue and suddenly poured into his throat.

At this moment, you can't be dizzy, and you will be absolutely dead!

Just as he was about to give up the radar with regret, he suddenly felt that his whole body was suddenly light, as if he were pulled by a large hand, and rushed out to the exit.

At this time, Yi Feng is in a state of extreme concentration, all by one breath.Unprepared to pull, the heart is tense, "cuckling" into a few mouthfuls of seawater, and then choking into the bronchial tube, the whole lung has a strong reaction, a large number of bubbles all spit out.

“There are enemies!”He subconsciously wanted to shoot behind, and the ability of a person in the bottom of the sea was too limited.

But in the confusion, he soon thought that it should be "Ling" suddenly opened his head and was helping him...

“Quickly!Hurry up!”

“It is closed!”

“Fuck off, don’t stop me!”

The algae at the exit has been flooded, and in fact these are all signs of Ling, and they are about to block the entire exit.

Suddenly, a huge wave of water directly drove them away, and then these marked seaweeds also came into contact with nanorobots and were quickly swallowed up.

But taking advantage of this effort, Yu Yifeng had passed through this exit like a fish and shot out like a shell.

The next moment, a few arms had gripped him firmly.

“The Captain!”

Zhao Yao's heart was full of joy, he saw the power armor on Yi Feng disappear, and he thought of something in an instant.I wanted to pull out the oxygen tube on my power armor, but I thought that Yifeng's lungs were all water, and it was no longer able to absorb oxygen.

All he could say was, “Quick!“Withdraw, withdraw!”

"A big deal of nuclear bomb ready!"And the pulse . . .

At this last moment, Yu Yifeng was exhausted, and there was no oxygen supplement in front of him, but he only saw his teammates, and ... a green group ... this idea gradually dissipated, and finally fainted.

But what he held in his hand... still not put it down!