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1·Give me one good reason why I should help you.

我为什么要帮你？给我一个充分的理由。《牛津词典》

2·There is no earthly reason why they should ever change.

他们毫无理由改变。《柯林斯英汉双解大词典》

3·That was the very reason why he felt a certain bitterness.

那正是他感到有点痛苦的原因。《柯林斯英汉双解大词典》

4·There's a reason why women don't read this stuff; it's not funny.

妇女们不读这种东西是有原因的：它并不逗趣。《柯林斯英汉双解大词典》

5·He confirmed that the city had been closed to foreigners, but gave no reason why.

他证实这座城市已经禁止外国人进入，但没有给出原因。《柯林斯英汉双解大词典》

6·The reason why the injection needs repeating every year is that the virus changes.

每年需要重新注射的原因是这病毒经常变化。《牛津词典》

7·That is the reason why it is so special!

这就是它如此特别的原因！

8·Is there any reason why you can't get enough sleep?

你睡眠不足有什么原因吗？

9·That's one reason why the shoes can still be seen now.

这也是我们现在还能看到这些鞋的原因之一。

10·The main reason why this place is so important to me is my grandmother.

这个地方对我如此重要的主要原因是我的祖母。