在这个故事里，时间也是为上路预备的。

In this story too, time is just a provision for the road.

youdao

这个小球可以在墙上，物体表面上，亦或是你的手腕上投射时间，但是一旦被你家的狗狗踢弄和当做玩具时，它也是很容易就不翼而飞的。

The orb will project the time onto a wall or surface or your wrist and easily be lost when kicked or played with by a dog.

youdao

每个人都必须认同这个项目是可行的——那就是说，这个项目是值得做的，时间和成本的评估也是可信的。

Everyone must agree that the project is viable — that is, that the project is worth doing, and the time and cost estimates are credible.

youdao

This should all sound incredibly familiar, like I'm just repeating myself in terms of photoelectric effect, because essentially that's what I'm doing, and that's one reason we spent so much time and did so many problem-set problems on the photoelectric effect.

这应该听起来极其熟悉，就像我在重复自己在讲光电效应时所说的话，因为基本上我正是在这样做，这也是我们在光电效应这个问题上,花这么多时间,做这么多习题的原因之一。

麻省理工公开课 - 化学原理课程节选