Manatees fart to maintain the right buoyancy in water.

海牛放屁是为了在水中保持适当的浮力。

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

是水深、气压、食物能量还是浮力。

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

英国宇航员蒂姆·水能给我们浮力。

Their natural buoyancy comes from their body structure.

它们的自然浮力来自于它们的身体结构。

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

很酷的 好 膝盖微曲 找到那种浮力。

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

这些气泡就像浮力装置一将花生向上拖动。

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

要调整浮力，如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.

在太空中受到的浮力和在水中受到的浮力相同，所以宇航员在泳池中练习太空。

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

海水不仅比淡水浮力大，吸入也会更安全。

They're more buoyant than bottles and so can travel further once they're in the sea.

它们比瓶子更具浮力，因此一旦进入海洋可以漂得更远。

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

是的。水能产生浮力空气也能。

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

海洋的任何搅动都被表层海水所增加的浮力给掩盖了。

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

它是有浮力的，它的重量比它排开的牛奶轻。

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。他们把一个浮力袋系在了上面。

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

所以，如果我深深地吸一口气，我就会变得更有浮力？

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

空气比水轻得多，所以充满空气的潜艇自然会更有浮力。

The experiments that you and I are working on to demonstrate density, buoyancy, and the compression of gases.

你和我正在做的实验来证明密度，浮力和气体压缩。

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，来自金属氢的浮力，抵消掉向下的重力。

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的影响在海洋中通过浮力得到缓解。

That force of buoyancy pushes up on each ring, until it matches the downward force of gravity.

浮力在每个环上向上推，直到它与向下的重力平衡。