随着印度和中国越来越多的人喜欢巧克力，对于第一个原因我们无能为力。

With more and more people in India and China loving chocolate, not much can be done about the first cause.

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另一个原因是，随着时间的推移，试图减肥的人群比例一直在增加。

Another cause is that the proportion of people who are trying to lose weight has been increasing over time.

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随着夏天的来临，想通过节食减肥的人数在急速上升。但是他们大多数在三个月内就放弃这个想法，原因是他们看不到结果。

As summer closes in, the number of people who are eager to go on a diet increases drastically, but in three months most of them give up this idea, for they notice no measurable results.

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