懂得如何做;能;专门知识;技术诀窍;
例句:
I don't know how you can say that.
真想不到你竟说那话。
I didn't know how to tell you.
我不知道该如何告诉你.
We don't know how the transcript leaked.
我们不知道文字本是怎么泄露出去的。