Since the 1960s, scientists have been fascinated with shampoo's fluid dynamics.

自20世纪60年代以来，科学家们一直着迷于洗发水的力学。

Hydrodynamic and aligned with a layer of grease, the shell is completely waterproof.

符合力学而且附有一层油脂它的硬防水。

This hydrodynamic finding could help engineers design systems that rapidly drain reservoirs, regardless of size.

这项力学的发现也许有助于工程师们设计出任何尺寸可快速排水的蓄水池。

The work was presented at a meeting of the American Physical Society's Division of Fluid Dynamics.

这项研究已在《美国物理协会力学分会会刊》杂志上发表。

Among the hardest patterns we've tried to understand is the concept of turbulent flow in fluid dynamics.

力学里湍的概念就是我们探求过的最艰深的模式之一。

He had to be acquainted with meteorology and know enough fluid dynamics to make sure he didn't overload his ship with booty.

他还得熟悉气象学，并掌握足够的力学知识，以确保他的船没有因战利品而超载。

And in the world of fluid dynamics, if I pulse an air jet in one direction I basically pull air with it.

在力学领域，如果我向一个方向呼出空气，其实我也是在拉空气。”

But the sailors didn't account for fluid dynamics.

但是水手们没有考虑力学。

He thinks the answer is to be found in a field called magnetohydrodynamics.

他认为答案可以在磁力学领域中找到。

You know, holy smokes, you can look at insects and study fluid dynamics.

你知道，天哪，你可以观察昆虫并研究力学。

In both cases,   complex fluid dynamics are in play, giving rise to eerily similar characteristics.

在这两种情况下，复杂的力学都在发挥作用，从而产生了惊人的相似特征。

He therefore has a plan to use magnetohydrodynamics to guide that plasma away from vulnerable areas.

因此，他计划利用磁力学引导等离子远离脆弱区域。

Their scientific work in plasma fluid dynamicswill have deep implications for how we understand our universe.

他们在等离子力学方面的科学工作将对我们如何理解宇宙产生深远的影响。

You see, the fundamental equations describing fluid dynamics, the Navier-Stokes equations, are famously challenging to understand.

你看，描述力学的基本方程，即纳维-斯托克斯方程， 是出了名的难以理解。

Because they happen to be my area of expertise as an engineer, in fluid dynamics.

这恰好是我的专业领域 作为一名工程师，在力学方面。

So, in order to grasp the essentials of fluid dynamics, let’s just do some pretending, shall we?

那么，为了掌握力学的本质， 让我们假装一下， 好吗？

At this point,   the principles defining crowd movement are closer to fluid dynamics than anything else.

在这一点上，定义人群运的原理比其他任何东西都更接近力学。

But the real culprits were two scientific phenomena: buoyancy and fluid dynamics.

但真正的罪魁祸首是两种科学现象：浮力和力学。

And so there are a lot of interesting, open problems of physics and fluid dynamics embedded in it.

因此，其中嵌入了许多有趣的、开放的物理学和力学问题。

Today, that concept is known as Pascal's Principle, and it's the reason hydraulics are so useful.

今天，这条定律被称为帕斯卡定律， 这就是力学如此有效的原因。