在跑鞋的寿命达到一半之后，你就应该买一双来轮着用。

About halfway through the life of your running shoes, you might want to buy another pair of running shoes to rotate into your runs.

youdao

你们怎么会认为我们很擅于从你们的30双鞋中挑出一双来配你们的连衣裙呢？

What makes you think we 'd be any good at choosing which pair, out of thirty, would look good with your dress?

youdao

为避免膝盖疼痛，你可以在柔软的地面上跑步，多加练习来加强腿部肌肉，尽量不在斜坡上跑，并买双好的跑鞋。

To avoid knee pain, you can run on soft surfaces, do exercises to strengthen your leg muscles, avoid hills and get good running shoes.

youdao

So let me challenge you with this: inside of these curly braces where I have put a comment with slash slash -- a "comment" means nothing here gets compiled, it's just for the human to read.

让我用这个来挑战你们：,在这些花括号里面，我通过双斜杠写入了一个注释,-一条“注释“在这里不会被编译,它只是用来我们阅读的。

哈佛公开课 - 计算机科学课程节选

to make sure that it's going to be a comfortable pair of shoes that last me a long time.

来保证这双鞋很舒服而且可以穿很久。

不需要名牌 - SpeakingMax英语口语达人

Then we're going to actually use MO theory to describe bonding within these molecules, and we'll start with homonuclear diatomic molecules.

然后我们要利用MO理论,来描述这些分子内的成键，我们要讨论同核双原子分子。

麻省理工公开课 - 化学原理课程节选