当你这么做时，你的方向就会变得清晰。

When you do this, your direction will become clear.

youdao

当你这么做时，视觉化光球的光芒，将沿著手指划过的路径往下，穿过你的身体并且穿过你的脚底，到达永恒。

As you do this, visualize the light in your head coming down along with your finger, down through your body and beyond your feet down to eternity.

youdao

当你这么做时，把他们的关注保持在你正在实现的当前迭代的需求上，这样的结果就是每次迭代都能增量交付功能。

While you are doing this, keep their focus on the requirements that you are implementing in the current iteration, resulting in an incremental delivery of functionality each iteration.

youdao

It is true mathematically, you can add two numbers, but you've got to ask yourself,"What am I doing as a physicist when I add these two numbers?"

在数学上它是正确的,你可以引入这两个常数,但是你需要问问自己,当我引入这两个常数时,这么做有什么物理意义

耶鲁公开课 - 基础物理课程节选