有44%的垃圾是由发达国家产生的；且仅在美国，平均每个人每月都要扔掉相当于他们体重重量的垃圾。

The developed countries are responsible for 44% of waste, and in the US alone, the average person throws away their body weight in rubbish every month.

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头部平均重量是7-8磅——趴着的话对脸部可是不小的压力。

The average head weighs 7 to 8 pounds—a lot of pressure to be putting on your face every night.

youdao

7头猛犸象的平均重量为70吨。

An average weight of the 7 mammoths is 70 tons.

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