有些运动主要涉及整体的垂直或水平运动，其中转动可以忽略，可以用三维线性运动的简单方程来研究。

Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in three dimensions.

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垃圾可以被简单区分为并归入塑料、玻璃和纸三类。

Rubbish can easily be separated and sorted into plastics, glass and paper.

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大约有50%的人三个月后举手，苏格拉底再次问道：“谁还坚持最简单的摆动动作？”

About 50% of them raised their hands 3 months later, Socrates asked again, "Who still insist on that most simple action of swinging?"

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This is very easy molecule because we know exactly where to put them without even having to think, we only have one option, and we'll make a triple bond between the carbon and the nitrogen.

这个分子非常简单,因为我们知道应该把它们放在哪里,甚至不用去想，我们只有一个选择，我们将在碳与氮之间形成一个三键。

麻省理工公开课 - 化学原理课程节选

We're interested only really in two things: One, can you differentiate between duple and triple meter; and two, can you recognize some very basic rhythmic patterns?

我们这里只关注两件事,一,你能不能区分两拍子和三拍子,二,你能不能识别一些简单的基本节奏形式

耶鲁公开课 - 聆听音乐课程节选

Very simple. You have three M&Ms.

很简单的实验，你有三粒M&M巧克力。

耶鲁公开课 - 心理学导论课程节选