易得易失。用英语怎么说？

易得易失。

Lightly come, lightly go.

lightly

adv. 轻轻地，轻巧地，轻松地，轻快地，轻易地，容易地，不费力地，轻率地；

例句
Despite his bulk he moved lightly on his feet.
尽管他身形庞大，移动起来还是很灵巧。

come

vi. 来，开始，出现，发生；vt. 做，装扮…的样子，将满（…岁）；int. 嗨！；

例句
I've come looking for a bit of advice.
我特来讨教。

go

vi. 走，离开，去做，进

例句
I would love to go abroad this year, perhaps to the South of France.
我今年很想出国，可能是去法国南部。