tarnishing的例句（tarnishing在句子中的用法）

• 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?
• 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.