If the pen was turned upside down the capillary action and the surface tension of the ink would stop it from falling out the back of the pen.

如果把笔倒过来，毛细作用和墨水表面张会阻止墨水从笔背面掉出来。

Most are regular pneumocytes called type I pneumocytes, but some, called type II pneumocytes, have the ability to secrete a substance called surfactant, which helps decrease the surface tension within the alveoli and keeps them open.

大部分为I型肺泡细胞，还有一些为II型肺泡细胞可以分泌一种表面活性剂，这有助于降低肺泡内表面张，并保持它们开放。

That's what creates surface tension and it has a property called cohesion.

这就是产生表面张原因它有一种叫做内聚特性。

Those decrease the surface tension of fatty stools, allowing them to absorb water and become soft — like how soaps and detergents let water and oils mix when you're washing your hands.

它们可以降低脂肪型粪便表面张，粪便吸收水分变软，跟肥皂和清洁剂在你洗手时将水和油相混合过程类似。

As the drop continues to fall and grow, at some point, it becomes too large for the surface tension to hold it together, so the raindrop breaks apart into smaller spherical drops.

随着雨滴继续落和增大，在某一时刻，它变得太大，表面张无法将其保持在一起，因此雨滴分裂成更小球形雨滴。

The team found that the insects pushed off with a downward force that exceeded the surface tension. That's the force that glues the water surface molecules together.

他们发现这种昆虫使用大于表面张向来推动自己，这种能水面分子聚合在一起。

The chemical properties of soap lower the surface tension of water, so anything relying on surface tension to stay afloat will sink.

肥皂化学性质降低了水表面张，因此任何依靠表面张保持漂浮东西都会沉。

It would quickly engulf you, its surface tension too hard for you to break and you'd drown.

它会很快把你吞进去，由于表面张太难打破，你会被淹死。

Instead, they gather into thick blobs of liquid around their eyes because the water surface tension holds tears together.

相反，眼泪在眼睛周围凝结成浓稠液体团，因为水表面张把眼泪聚集在了一起。

Or the Blue Dragon nudibranch, which floats upside down in the water using surface tension and camouflages with the water.

或者是蓝龙裸鳃鲨，它利用水面张倒挂在水面上，并利用水面伪装自己。

Well, now that you can focus again, what do you say we get back to surface tension of domain walls?

现在你注意又能集中了，咱们可以回到畴壁表面张研究了吧？

But for an insect the force of water surface tension is so strong that getting wet is a question of life and death.

但对于昆虫，水表面张是如此强，碰水变成一个攸关生死问题。

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

一个有浮物体总是会排斥由表面张弹性膜支撑东西。

How does your brain feel about calculating the surface tension of the domain walls?

那你大脑对于计算畴壁表面张怎么看？

Like surface tension which turns water into a potentially deadly substance for insects.

如表面张，把水变成对昆虫致命潜在陷阱。

Small droplets of water in the atmosphere are spherical in shape due to the surface tension, or " skin, " of the water molecules.

由于水分子表面张或“表皮”，大气中小水滴呈球形。

Water can't enter it because their hairs are too tiny to break its surface tension.

水无法进入，因为它们毛发太细密了， 无法打破水表面张。

Surface tension happens because water molecules are more attracted to each other than the air around them.

表面张出现原因是因为水分子彼此之间吸引比它们周围空气对它们吸引更大。

And so the insect carries its own outside lung around and can basically breathe underwater thanks to surface tension.

所以昆虫能到处带著自己外肺。并基本上能在水呼吸。一切受惠于表面张。

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

但是有浮物体不依赖于表面张，所以它们会继续在弯月面浮动。