客户方：你们上一批送来的材料，大部分都不能用。
Customer: We can't use most of the material you sent us on the last shipment.
汽车暴露在外部分所用的钢材不能用回收材料生产，它们必须能够经受风雨的侵蚀。
Exposed steel used in automobiles can't be made with recycled material and has to be treated to withstand the elements.
你们发来的上一批材料，大部分都不能用。
We can't use most of the material you sent us on the last shipment.
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