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 thei...
Bushes were interspersed among trees.灌木散布在树林之中....a landscape of mixed forest interspersed with bamboo groves.有竹林点缀其间的一片混交林风景区The grass was interspersed with beds of flowers.草地上点缀着许多花坛.Lectures will be interspersed with ...
有很多仆人服侍她。There were plenty of servants to wait on her.虽然他上了年纪, 但他不要别人服侍他.Old as he was, he refused to be waited on.护士服侍病人.A nurse ministers to the sick....