A good rule of thumb is that a broker must generate sales of ten times his salary if his employer is to make a profit.

根据经验来看，如果雇主要获得利润，那么其代理商必须卖出相当于其工资10倍的销售额。

柯林斯例句

Here's a good rule of thumb for house guests : Short stays are best.

最好不要 久留 --这是给访客的经验之谈.

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