Leather industry is one the of trades with serious pollution.
制革行业是环境污染严重的行业之一。
The basic idea of this method is to increase the % of your body weight that you use in order to increase the difficulty.
这种训练方法主要是在训练中通过加大所用的体重来逐步增加困难级别。
Smoking is one of the _____________ of heart disease.
吸烟是引起心脏病的一种病因。
Smoking is one of the _____________ of heart disease.
吸烟是引起心脏病的一种病因。
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