世界杯也是造成睡眠不足的主要原因。

The World Cup is also chiefly responsible for sleep deprivation.

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睡眠不足可能是这类问题产生的一个原因。

Lack of sleep may be a cause of this type of problem.

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最后，但并非最不重要，睡眠不足是助长青少年肥胖的原因。

Last but not least, a lack of sleep is the cause contributing to teenage overweight.

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最后，但并非最不重要，睡眠不足是助长青少年肥胖的原因。

Last but not least, a lack of sleep is the cause contributing to teenage overweight.

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