我们提供十年不生锈的保证。
他分析了它的成分,发现不生锈的样品含有14%的铬。
He analyzed it and realized that the specimen that wasn't rusty contained 14 percent chromium.
不锈钢至少要含有10%的铬,这就是不锈钢不生锈的原因。
Stainless steels must contain a minimum of 10% chromium. This is the reason why they are stainless.
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