The inves-tigators found that the underground pipes were badly corroded.调查人员发现地下管道严重腐蚀。Engineers said that plutonium could begin seeping from the corroded sub.工程师说钚可能会开始从遭腐蚀的潜艇往外渗透。Rust has corroded the steel rails.锈侵蚀了钢...
He is not yet out of his apprenticeship.他尚未满师.After serving his apprenticeship as a toolmaker, he became a manager.结束了工具匠的学徒期以后，他当上了经理。Benjamin was bred a silk dyer an apprenticeship in London.拜雅明是学染丝的,在伦敦当学徒.He served h...