If the birds have not flown for three years, they will soar into the clouds. If they have not sung for three years, their songs will take everyone by surprise.

三年不蜚，蜚将冲天；三年不鸣，鸣将惊人。

They reduced the odds that a predator would take us by surprise or that we'd overlook a nearby source of food.

这样一来，我们被对手突袭的机会减小了，也不会错过触手可及的食物。

How it happens will take you completely by surprise.

这件事情的发生会让你呆若木鸡。

The best flirtatious moments will always take you by surprise.

那精彩的瞬间总能带给你惊喜。

But it's a deed to be reserved for a forlorn hope; I'd not take Linton by surprise with it.

但是为了一个可怜的希望，还是值得活下来——我不愿突然打击林惇。