1. increase vt.增加，增大
例句：He exhorted his workers to increase production.
他力劝自己的工人增加生产。

2. invest vt.投资; 花费
例句：Can I be sure of a profit if I invest?
我要是投资, 肯定能获利吗?

3. recognize vt.承认;识别
例句：I recognize that she works harder than I do.
我认识到她比我用功。

4. reduce vt.减少; 缩小
例句：Oil is put in machinery to reduce the friction.
把油涂到机器上减少摩擦。

5. compare vt.比较，对照
例句：Judges meet regularly to compare sentences.
法官们定期开会，比较课刑情况。
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