How do I know it was so expensive?
为什么我知道它这么贵？
我怎样晓得它是平安的呢？
我怎么知道它有效？
So I know I get the correct event, but how do I know it meant something?
我知道我得到了一个正确的事件，但我如何知道他表达了什么?。
I realized that all of us should really know how to do it.
我意识到我们都应该真正学习如何去做。
I have this idea in my mind of a tree how do I know there is anything behind it.
我在头脑中有了关于树木的意识，那我如何知道在这之后还隐藏着什么呢。
Chinese: I do not know. How long should it take?
中国人：我不知道，这应该需要多长时间？
我不知道怎样把它遮起。
How do I know that it is true?
我如何知道它是正确的？
I really don't know how parents do it without the power of prayer.
我真不知道当父母请求的能力那将会成为什么样。
Do you mean how do I know that it is perpendicular to a level curve?
你想问的是，我如何知道它是和等高线垂直的吗？
I don't know how else to do it except that way.
除此之外我不知道还有别的什么道路。
This isn't to say that I know exactly how to do it.
这并不是说我完全知道该如何去做。
你怎么知道我恰巧需要它？
I don't know how to do it really.
我不知道要多快才行。
I cannot start something if I do not know exactly how to finish it.
如果我不知道如何完成某事，那就索性不要开始做这件事？
I know that I have the light within me, but how do I light it?
我知道我的里面有光，但是我如何点燃它？
I have confidence in improving my English and I know how to do it.
我有信心提高我的英语，而且我也知道怎么做到这一点。
Later she said, casually, "I think I know how Roger and Don do it."
之后她漫不经心地说道，“我想，我知道罗杰和唐恩是怎么做的了。”
Could you help me out, because I just don't know how to do it.
因为我实在不知道怎么解。
Her father told her, "If you do, I know how to handle it, so let's start running!"
她的父亲告诉她，“如果你真的想去，我知道该怎么控制你的病情，所以，我们一起跑步去吧！”
Top 1: How do you know I can’t do it?
你怎么知道我做不了？
我不知道你是怎么做到的。
How come I never saw anyone else do magic. Is it just us? Are there more - you know, like me and you?
我怎么就从来没看见过还有人会魔法？难道只有咱们俩吗？还有别人吗？——你知道，我是说和你我一样的人。
Honestly, I don't know how you do it.
说实话，我真不知道你是怎么过的。
I don't know how you do it, man.
我不知道你怎么办到的伙计。
I don't know how you do it, man.
我不知道你怎么办到的伙计。
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