" I'm going to the store. I'll be back in two shakes of a lamb's tail" !

" 我要去商店。我会马上回来（in two shakes of a lamb’s tail）！"

I would not say, " Hold on! Help will be here in two shakes of a lamb's tail" !

" 坚持住！ ‘羊尾巴摆两下的时间内’救援就会到了！"

But we will be back in two shakes of a lamb's tail. Well, actually… we'll be back next week!

但我们马上（in two shakes of a lamb’s tail）就会回来的。好吧，实际上… … 我们下周再见！

I’ll be back in two shakes.

【shake】我马上就回来。

But with any luck, we could solve the problem in two shakes of a lamb's tail. We could have our answers quickly and easily.

但是有时候运气好，我们能立即(in two shakes of a lamb’s tail)解决问题。我们能够迅速简便地得到答案。