Some Cu - Al structures used in thermal exchangers may lead to galvanic corrosion.铜铝结构热交换器存在着电偶腐蚀的倾向.The actue toxic effect of heavy metal Cu ~ ( 2 + ) to Stentor Polymorphrus ( Ciliophora, Heterotrichida ) was studied.研...
他谦逊地说，念中学时他曾经是游泳冠军。He had been, he said modestly, swimming champ at high school.他太谦逊，不愿意邀功。He was too modest to claim the credit.安迪是个谦逊而且彬彬有礼的绅士。Andy was a humble, courteous and gentle man....
几年前，大卫·拜恩曾登上《时代》周刊的封面。A few years ago, David Byrne was on the cover of Time magazine.《时代》周刊的四色整页广告无法代替它.A four color spread in Time is no substitute for it.还有着很多因素阻碍着我国新闻周刊的发展.There are a number of factors that baffle it...