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可可电台，每期节目一话题，让英语磨练耳朵的同时学到更多有益的小知识，丰富知识的同时受益于生活。
拒绝快餐
Fast food "burgers" don't have much burger in them
快餐汉堡中并没有很多肉
One study found that most fast food burgers are composed of about 50 percent water and the actual meat content is only 2.1 to14.8 percent.
研究发现大多数快餐汉堡里有50%的水，实际肉含量只有2.1%到4.8%。
So what makes up the rest of it, you ask? Chemical fillers and preservatives, mostly.
所以你会问剩余的部分是由什么组成的？大多数是化学填料和防腐剂。
That's why we see read horror stories about burgers that don't go bad.
那就是为什么我们读到关于汉堡不会变坏的恐怖故事。
【知识点津】
be composed of 由…组成；由 ... 组成
例句：
The shop name shallbecomposedofmore than two Chinese characters.
字号应当由两个以上的字组成.
preservative n.
例句：
The wood is treated with preservative to prevent decay.
这块木头用防腐剂处理过以防止腐烂.
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