我们认为，除非有人向他指出错误，否则他是决不会注意到错误的。除非他犯了错误，他决不会改正错误。

We thought that he would never notice a mistake unless it was pointed out to him, to correct it unless he has made to.

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当你学习一种新的语言的时候，不要害怕出错，否则你不会走得更远。

When you're learning a new language, you can't be afraid to make mistakes, otherwise, you won't get very far.

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否则，您将会得到如图22所示的出错信息。

Otherwise, you will get the error message that Figure 22 shows.

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