（一）
Lets talk about the problem of quantity.
我们谈谈数量的问题吧。
Youll issue a certificate of quantity and weight.
你们必须出具数量和重量证明书。
The package number and quantity are identical with each other.
包装号与商品数量相吻合。
Quantity matters as much as quality of price, doesnt it?
数量和价格、质量一样重要，是吗？