出其不意

I was surprised by the abrupt change of subject.

出其意的变换题目让我很吃惊。

Look, you whiney crybaby, we're not wasting the element of surprise to mollify your nyctophobia.

听着，你这个瞎抱怨的爱哭鬼，我们可会为了迁就你的黑夜恐惧症出其意这一要素。

The police surprised the thief into confessing.

警察出其意地使小偷招认了。

This is a very quick and surprisingly effective way to limit your opponent's economy and is especially effective against the turtler because they honestly won't be expecting it.

这是个限经济的非常迅速又出其意的有效方式，在对抗龟派时尤其有效，因为它们通常会想到的。