When you have got an elephant by the hind legs and he is trying to run away, it is best to let him run.

When you have got an elephant by the hind legs and he is trying to run away, it is best to let him run.

当你抓住一头大象的后腿，它试图逃跑时，最好让它跑。

-- Henry Wadsworth Longfellow 朗费罗