This pull is aided by a fundamental property of water called capillary action.

这种拉力还得到水的一种基本特征——用的帮助。

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，用和墨水的表张力会阻止墨水从笔的背掉出来。

The first is: What is the molecular motor that's responsible for the hair cell's amplification?

负责胞扩音用的分子马达是什么？

This is exactly what hair cells do.

胞的用正是这样。

This is called capillary action and it's what allows water to climb tree roots and nutrients to flow around our body.

这就是所谓的用，这让水能够爬上树根、让营养物质在我们体内流动。

So it does the job of the hair cell.

所以它起到了胞的用。

In fact, without the limitations of gravity on capillary action, directing liquids through these micro-structures could be extremely efficient.

事实上， 如果没有重力对管用的限制，引导液体通过这些微结构可能会非常有效。

Well, that's the job of the microscopic lymphatic capillaries.

这是显微镜下淋巴管的用机制。