Why would anyone make their work more difficult than it already is?

工作已经很难了，为什么有人会让自己的工作比现在更困难呢？

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According to the passage, why is it difficult for foreigners to learn Chinese?

根据文章，为什么外国人学习汉语很难？

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Why is the obesity problem in Britain so difficult to solve?

为什么英国的肥胖问题如此难以解决？

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It was difficult for her to understand why she had married.

VOA: special.2009.06.27

But I want you guys to think about why it was difficult to do it another way, which is more pedestrian.

但是我希望你们能思考一下,为什么用另一种更普遍的方法来做,反而会比较难呢

耶鲁公开课 - 基础物理课程节选

Why has it been so hard and why does it continue to be difficult to identify these pluripotent cells within tissues?

为什么会那么难呢,为什么在组织中识别多能干细胞,始终困难重重呢

耶鲁公开课 - 生物医学工程探索课程节选

But he said he would continue to go around the country explaining why "difficult decisions" were being taken "in the long term interests of everyone in our country".

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That is why it is so difficult to study and why the studies show mixed results.

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That is why it is difficult to predict the outcome of these elections, and why when you talk to people in the streets, or go out in restaurants, or interview analysts, you will hear as many scenarios as there are people ready to talk.

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