第159句：

Ask anyone why there is an obesity epidemic and they will tell you that it's all down to eating too much and burning too few calories.

随便问一个人为什么他会患上肥胖症时，他们都会告诉你，“那都是由于平时吃得太多而消耗的热量又太少”。

六级词汇讲解:

本句是个并列复合句，主干是Ask anyone why...and they will tell you that...why引导的从句作anyone的宾语补足语；that引导的从句则作you的宾语补足语。

be down to意为“可归因于，因为”。如：

How much sleep you need could be down to one gene.

人需要多少睡眠时间可能归因于一种基因。

六级考点归纳：

与few相关的短语在六级考试里也很常见：

a good few意为“相当多，不少”。如：

I've tumed down a good few job offers.

我已经拒绝了不少工作机会。

a very few意为“极少数”。如：

Only a very few people can understand his new theory.

只有极少数人能理解他的新理论。

no fewer than意为“不少于，多达”。如：

There were no fewer thana thousand people in the hall.

大厅里有多达1000人。

quite a few／not afew意为“相当多，不少”。如：

Quite a few people came to the New Year Concert.

有相当多的人来听新年音乐会。

some few意为“有一些；颇有几个”。如：

Some few ofthe students are absent today.

有些同学今天缺席。