老师先给我们讲题，然后再让我们自己解题。

Lǎoshī xiān gěi wǒmen jiǎng tí, ránhòu zài ràng wǒmen zìjǐ jiě tí.

The teacher first explains the problem to us, then lets us solve it ourselves.

我不太理解这句话，你能再说一遍吗？

Wǒ bù tài lǐjiě zhè jù huà, nǐ néng zài shuō yí biàn ma?

I don’t really understand this sentence; could you say it again?

老师给我们解释了这个词的意思。

Lǎoshī gěi wǒmen jiěshì le zhè ge cí de yìsi.

The teacher explained the meaning of this word to us.