make certain

汉语翻译

例句：

1. Make certain of your position in the firm before you argue with the director.
   你在和经理争辩之前，要首先弄清你在公司里的地位。
2. The authors wish you to read it with a pencil in your hand, for you will often be asked to make certain notations, to write answers to particular questions.
   作者们希望你在读这本书的时候手里要拿上一支铅笔，因为我们要求你经常做点笔记，或是将一些具体问题的答案写下来。
3. You'd better leave now if you want to make certain of getting there on time.
   你要想准时到达那里就最好马上走。
4. She shook it to make certain there was nothing inside.
   她把它摇了摇，想知道里面确实没有东西。