通常我都会在60秒内就取好一个标题，不过同时会有许多经验浮现在我脑海。

It normally doesn't take me more than 60 seconds to title an article, but a lot of experience goes into those 60 seconds.

youdao

或者，我们指定采样周期，此为逆向取采样率（本例子中， 0.5 秒）。

Alternatively, we can specify the sampling period, which is the inverse of the sampling rate (in this example, 0.5 sec).

youdao

煮洋葱的同时，另外取一小平底锅，倒入白葡萄酒，微煮30秒去泡沫。

While the Onions are cooking, bring the wine to a boil in a small pan, then bubble away for 30 secs.

youdao

If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.

如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上

耶鲁公开课 - 基础物理课程节选