国家指导方针建议我们每周做140分钟中等强度的活动。

National guidelines recommend we do 140 minutes of moderate-intensity activity a week.

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我们先来做点强度小的练习。

Let's start off with some gentle exercises.

《牛津词典》

这些木雕和石雕都是他用火雕刻和标记的，用以说明数百万年来塑造我们星球的力量的暴烈程度和强度。

These are wood and stone sculptures that he's carved and marked with fire to illustrate the ferocity and intensity of the forces that have shaped our planet over millions of years.

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So, if we have a high intensity, we're talking about having more photons per second, and it's important to know also what that does not mean.

所以，如果我们有一个高强度，我们就是在讨论每秒钟,有更多的光子数，同样理解它不代表什么,也是很重要的。

麻省理工公开课 - 化学原理课程节选

And when we talk about covalent bonds, there's 2 properties that we'll mostly focus on, and that's going to be thinking about the bond strength or the energy by which it stabilized when it bonds.

而当我们讨论共价键的时候，有两点特性是我们最关注的，那就是键的强度,或者说成键之后能量降低了多少。

麻省理工公开课 - 化学原理课程节选

But in terms of SI units, which become much more useful if you're actually trying to use intensity in a problem and cancel out your units, we're just talking about joules per second is what intensity is.

但是用国际单位制，这个变得越来越有用了,如果你实际上在使用强度,来解决问题和约化单位，我们仅仅讨论每秒钟的焦耳,这就是强度。

麻省理工公开课 - 化学原理课程节选