If metal gets hot it expands.

金属受热就膨胀。

《牛津词典》

When matter is heated, it expands.

物体受热则膨胀。

《新英汉大辞典》

But that isn't how it expands money and credit.

不过，美联储并不是这样扩大货币和信贷供应量的。

youdao

And it expands the number of officials dramatically.

如此一来,官员的数目急剧增加

耶鲁公开课 - 欧洲文明课程节选

And then it expands.

然后不断扩大。

哈佛公开课 - 幸福课课程节选

It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.

让它与大气接触冷却,改变约束，使它继续冷却，然后又再次加热,这就是循环热机，我们以前也研究过，更复杂的机器。

麻省理工公开课 - 热力学与动力学课程节选

It expands family leave rights for the family members of our troops and veterans.

WHITEHOUSE: President Obama Signs National Defense Authorization Act

The university has said it wants to improve its campus services as it expands.

BBC: Sussex students continue to occupy university building

Commercially, the Panama Canal has little choice: either it expands, or its trade will dry up.

ECONOMIST: Panama and its canal