does no harm

• vi. 无害

does no harm的用法和样例：

例句

1. I'll just job down that telephone number. We have a baby-sister that can usually come but it does no harm to have a second string.
   我要记下那个电话号码。我们请的照看宝宝临时工一般会来，不过有第二个供选择的人是不会有害处的。