老师已经说明了考试的时间和地点。

Lǎoshī yǐjīng shuōmíng le kǎoshì de shíjiān hé dìdiǎn.

The teacher has already explained the time and place of the exam.

请先看清楚说明，再开始做题。

Qǐng xiān kànqīngchu shuōmíng, zài kāishǐ zuòtí.

Please read the instructions carefully before you start answering the questions.

这个结果说明我们的办法是对的。

Zhège jiéguǒ shuōmíng wǒmen de bànfǎ shì duì de.

This result shows that our method is correct.