利大于弊的英文：
It does more good than harm for......

So, Mr. Chen, in your regards, does smoking outweigh the bad or does the bad outweigh the good?
那么﹐陈先生﹐抽烟对您来说是利大于弊还是弊大于利﹖

Do in Rome as the Romans do
入乡随俗

You do fractions, then you do decimals.
你先学习分数，然后，学习小数。

Do it for this once.
就干这一次吧。

The rainstorm is more and more more fierce.
暴风雨越来越猛烈。

The more illumination, the more temptation.
道高一尺，魔高一丈。

There are more and more gossipers.
现在传闲话的人越一越多了。

A good appetite is a good sauce
饥不择食

The prompt goods have good qualities.
当场付款的物品质量不错。

Be not simply good; be good for something.
不要单纯做个好人，还要做个能派上用场的人。