Since play fighting includes variations in speed and intensity, and quick role reversals involved with self-handicapping.

因为玩耍性打斗包括速度和强度的变化，以及与自我设限有关的角色快速转换。

youdao

Want proof of the difference in speed?

想要在速度上证明这种差异吗？

youdao

This leads to an increase in performance, especially in speed.

这使性能有所提高，特别是在速度上。

youdao

The difference in speed also means a difference in mass of 50%.

VOA: special.2009.01.20

- Part of the challenge is speed, too, how quickly you can get these answers in terms of getting them in on time.

部分困难也会来自于速度，你多快能做出答案,能否在规定的时间做完。

麻省理工公开课 - 化学原理课程节选

OK. Now. This is just sort of bringing us back up to speed and adding a few more details in.

好，现在，我们刚刚回头,过去看了一些,细节问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

The A2B Hybrid 24 model expects you to pedal, increasing in speed the harder you work.

BBC: Rent an electric bike in London

But what the living dead lack in speed, they make up for in other qualities.

WSJ: Why Zombies Are Everywhere

And when they were raising the horses for sale, they're just interested in speed.

NPR: Heartbreak at the Preakness Stakes