Isn't it water depth, atmospheric pressure, food energy, or buoyancy.

是水深、气、能量还是力。

British astronaut Tim Peake says water gives us buoyancy, which is the ability to float.

英国宇航员蒂姆·皮克说水能给我们力。

Manatees fart to maintain the right buoyancy in water.

海牛放屁是为了在水中保持适当力。

It's pretty cool. Okay. Soft bend, we find a buoyancy.

很酷 好 膝盖微曲 找到那种力。

The bubbles act as flotation devices that carry the peanuts upward.

这些气泡就像力装置一样将花生向上拖动。

You have to adjust the buoyancy and if you mess up you can sink.

要调整力，果搞砸了就会沉下去。

Floating in space is similar to floating in water, so astronauts practise their spacewalk in swimming pools.

在太空中受到力和在水中受到力相同，所以宇航员在泳池中练习太空行走。

Not only is saltwater more buoyant than freshwater, but it's also safer to inhale.

海水不仅比淡水力大，吸入也会更安全。

Yes. They take to the water and to the air too.

是。水能产生力空气也能。

Any such churning is overwhelmed by the extra buoyancy of the warmer surface layers.

海洋任何搅动都被表层海水所增力给掩盖了。

And that buoyant object did the opposite, it floated to the middle.

而那个有力体则相反，它漂到l了中间。

Say they come across a trap. They attach a lift bag to it.

他们偶尔会发现一个诱捕器。他们把一个力袋系在了上面。

So, if I take a giant deep breath, I become more buoyant?

所以，果我深深地吸一口气，我就会变得更有力？

Air is much lighter than water, so a submarine filled with air naturally becomes more buoyant.

空气比水轻得多，所以充满空气潜艇自然会更有力。

But buoyant objects don't rely on surface tension, so they continue surfing the meniscus.

但是有力体不依赖于表面张力，所以它们会继续在弯月面动。

A buoyant object will always repel something held up by surface tension's stretchy membrane.

一个有力体总是会排斥由表面张力弹性膜支撑东西。

So as you travel deeper, the buoyancy force from the metallic hydrogen counteracts gravity's downward pull.

所以当你下降得更深，来自金属氢力，抵消掉向下重力。

The impact on size that gravity has on the earth's surface is mitigated in the ocean by buoyancy.

重力在地球表面对体型影响在海洋中通过力得到缓解。

It's buoyant, it weighs less than the milk it displaces.

它是有力，它重量比它排开牛奶轻。

Their size gives them increased buoyancy and musculature to be great swimmers.

它们体型增了它们力和肌肉组织，使得它们成为了优秀游泳运动员。