to be on the safe side

• 为了保险起见； 出于安全考虑

to be on the safe side的用法和样例：

例句

1. Just to be sure,she carefully drew an imaginary line with her foot.
   为了保险起见，她仔细地用脚画了一条想象的界限。
2. To be on the safe side, I wonder if you could improve your packing somewhat.
   为了保险起见，你们是否能对包装稍加改进。