If you don't know where you are going, it's difficult to get there.

如果你不知道前进的方向，那么到达目的地会困难重重。

youdao

It's difficult to reach your destination if you don't know where you're going!

如果你不知道要去哪里的话就很难达到你的目标。

youdao

But if you don't know where you're going, how much difference does your speed make?

但如果您不知道打算去哪里，那么您的速度可以造成多大的差别呢？

youdao

You played the game; I don't know if there's a videogame now, if people play games like this where London Bridge is Falling Down.

你们也玩过这个游戏吧,我不知道现在是不是有电子游戏了,如果有人玩过伦敦桥这个游戏

耶鲁公开课 - 生物医学工程探索课程节选

Mr. JACKSON: If you don't know where the information is, how can you prove that it's being protected?

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Finding satellites can be a major pain sometimes, and the signal can drop while you're driving (see video), which could be a major headache if you're on a trip and you really don't know where you're going.

ENGADGET: An Engadget adventure with TeleNav's G1 GPS software: hands-on, impressions, and video

You turn up at an incident to help someone and you don't know if you are going into situation where you are going to get assaulted.

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