It sounds very interesting. People who came up with this idea must be very clever.

听起来非常有趣。想到这个主意的人一定非常聪明。

youdao

The tactics of courting a woman do not need to be too clever, but the tactics of leaving her must be very clever.

追求一个女人的手法不需要太聪明，但离开她的手法必须聪明绝顶。

youdao

After twice of catching fish, I found that just came out of the fish is "scouts," must be very clever, runs express.

经过上两次的捉鱼，我发现刚出来的小鱼是“侦察兵”，肯定特别机灵，跑得特快。

youdao

As a nine-year old it was obvious to me that there must be some very clever trick to making huge sums speculating in the markets.

FORBES: Mark Twain, Market Maxims And Making Money