飞鱼跳跃前进，在空中停留的时间特别长。

Flying fish leap for their lives and stay airborne for extraordinary lengths of time.

youdao

他们怎么样在空中停留？

How do they stay in the air?

youdao

他们在空中停留了25分钟，并且飞行了超过8公里。

They stayed in the air for 25 minutes and travelled more than 8 kilometres.

youdao

It goes up, stays in the air for a very long time, but it falls on your head.

它先上升 在空中停留很长时间,但是它会直接落在头上

耶鲁公开课 - 基础物理课程节选

You see how long you are in the air and the whole time you are in the air, you are traveling horizontally at this speed.

你可以知道在空中停留的时间,当你在空中运动的时候,你一直以这个水平速度在运动

耶鲁公开课 - 基础物理课程节选

This says, if you want to be in the air for a long time, so you may think that 90 degrees is the best angle.

也就是说,如果你想在空中停留更久,你也许会认为 90°是最佳选择

耶鲁公开课 - 基础物理课程节选