Tetrachloroethylene(perchloroethylene,PCE) is one of common organic contaminants because of its large usage and improper disposal.是什么意思_Tetrachloroethylene(perchloroethylene,PCE) is one of common organic contaminants because of its large usage and improper disposal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句