tarnishing造句

The causes of tarnishing gold and silver - plated connectors were studied respectively.
分别探讨了接插件镀金和镀银层变色的原因.

Bright tin electrodeposits on copper wire are susceptible to tarnishing.
铜线材经光亮镀锡后易产生腐蚀变色.

Do they not realize their foolhardiness and which they are tarnishing the Republic's image?
他们难道不知道自己的行为不但愚蠢,也会损害新加坡的形象?

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