They include things like cardboard houses, matchbox cars, bottlebrush trees and little people.

它们包括纸板房子模型、火柴盒汽车、洗瓶刷当的树和小人模型。

Here, swimming is acting as the subject of the sentence.

在这，游泳当句子的主语。

Gerunds are verb forms that act as nouns.

动名词是当名词的动词形式。

It acts like an adverb in the sentence.

它在句子中当副词的作用。

Student teachers are motivated to help Betty master certain materials.

当老师的生受到激励去帮助贝蒂掌握某些材料。

You're the one playing her spy when you should be in class.

你本该去上课，却当她的密探。

Finally, there are women who exercised moral leadership, doing hard things against all self-interest.

除此之，还有一些女性当的是道德领袖，她们披荆斩棘，她们不惜放弃自身所有利益。

When the ball is moving up, the molecules are acting as downward pressure.

当球向上运动时，分子就当向下的压力。

Targets for the hunters' spears are plentiful.

这当他们猎物的动物数不胜数。

He says UAS can act as a second pair of eyes for officers.

他表示，无人机可以当警察的第二双眼睛。

But blood can also serve as a refreshing beverage on a hot, dry day.

但在炎热干燥的日子，血液也可当清爽的饮料。

Remember how gerunds act like nouns?

还记得动名词是如何当名词的吗？

The robot was to prevent burnout, having robots be personal assistants to our employees.

机器人的作用是防止员工过度疲劳，当员工的私人助理。

Student teachers score higher on tests than pupils who're learning only for their own sake.

相比那些只为自己习的生，当老师的生在考试中的得分更高。

Adjective clauses are clauses that act like an adjective.

形容词从句是当形容词的从句。

He's going to use her as the vampire in the ritual.

他要她在仪式中当吸血鬼的角色。

The folks on the ground are in a very much a combat advisory role.

我们派去的人员将当战斗顾问的角色。

A noun phrase is a group of words that acts like a noun in the sentence.

名词短语是一组在句子中当名词的单词。

A special region in the center of our brain acts as our master biological clock.

大脑中央有一个特殊区域当着我们的生物钟。

However, the clown has also taken some hard hits as a bullfighter.

然而，当斗牛人的小丑也会经常受到一些伤害。