要聘请到速质好的老师嗜狠璃难的。

It's difficult to teachers of quality.

youdao

因为铝质轻而韧性好，所以被用作制造飞机和宇宙飞船的工程材料。

Aluminium is used as the engineering material for planes and spaceships and it is both light and tough.

youdao

如果你不能控制好果岭表层的腐殖质层(枯草层)，你会失去所有的一切。

If you're not in control of the thatch production in your surfaces, you lose all of that.

youdao

That's a really good question because if I open this up, why wouldn't it just reform with itself, why would it want to have this in here?

这是个很好的问题,如果我把质粒打开,为什么它不会自己合上,为什么它会与DNA片段重组呢

耶鲁公开课 - 生物医学工程探索课程节选