(= take action) 保证(證) ...
(bǎozhèng ... ) ⇒ Make sure that you follow the instructions carefully.
你一定要仔细按照说明书做。
(Nǐ yīdìng yào zǐxì ànzhào shuōmíngshū zuò.)
⇒ You must make sure that you finish your work on time.
你必须保证按时完成工作。
(Nǐ bìxū bǎozhèng ànshí wánchéng gōngzuò.) (= check), 查明 ...
(chámíng ... )
⇒ He looked in the bathroom to make sure that he was alone.
他看了看洗澡间，确定是否只有他一个人。
(Tā kànle kàn xǐzǎojiān, quèdìng shìfǒu zhǐyǒu tā yī gè rén.)