Two - stage chromate reduction has been used at several plants.一些厂已采用两段铬酸盐还原法.The potassium chromate method is one regular method to determine COD.重铬酸钾法是测定化学需氧量的常规方法.Cr - Fe waste residue is derived from production of ch...
She found his preoccupation with money irritating.她对他一心只想着钱感到很厌烦。The pictures belong to an era when there was a preoccupation with high society.这些画出自一个人人向往上流社会的时代。his growing preoccupation with death他对死亡越来越多的关注Karouzos&#...
只要有一点光亮的地方,我常遇到过她.I kept coming across her wherever there was the least light.相反地, 在这光亮的客厅里, 一切都显得安详 、 平淡, 而且稍有些滑稽.Instead, in the bright drawing - room, all seemed serene , anti - climactic, and slightly comic.拍竖镜头时他留下了...