He does not know what nerves are.

他不知道什么叫害怕。

I don't know what profession would suit me.

我不知道什么职业适合我干。

I don't know what all the fuss is about.

我不知道这样大惊小怪是为了什么。

I didn't know what I was letting myself in for.

我不知道自己会卷入什么样的麻烦之中。

Before knowing Yamaha Electone, we didn't know what was electronic organ.

在认识山叶电子琴之前，我们不知道什麽是电子风琴。

There’s something afoot here, but I don’t know what it is.

这里有什么东西不对劲，但我不知道到底是什么。

I don’t know what happened in the exams.I just freaked out.

我不知道考试是如何过来的。我完全吓懵了。

I don’t know what he has done, he just bumbles through life.

我不知道他做了些什么事，他简直是在混日子。

I don't know what's the difference between "degust" and "drink" in English.

我不知道在英文中“品尝”和“喝”有什么区别。

What do you mean, you don’t know what to do with your life? The world is your oyster!

你说什么，你不知道如何生活？未来是属于你的！

I don’t know what she said to him, but it worked like a charm—he’s much more cooperative now.

我不知道她对他说了些什么，但是收到了奇效；他现在非常合作。

I don’t know what’s going to happen— it’s in the lap of the gods now. All we can do is wait.

我也不知道会发生什么事情，现在一切都听天由命，我们只能等待。

I don't know what that fish was that took the bait just now.It could have been a marlin or a broadtail or a shark.

我不知道刚刚咬上鱼饵的是什么鱼，它有可能是条马林鱼或阔嘴鱼，甚至也有可能是一条鲨鱼。