氟化物的危害一般局限在制造厂的附近.Fluoride damage is generally restricted to areas near manufacturing plants.在茜素染料法中,氟化物的消色作用较慢.The bleaching action of fluorides is slow in the alizarin dye procedure.氟化物危害的特点是叶片顶尖灼燃现象.Fluoride injury of...
The police are beating the town for the escapee.警方正在镇上搜捕那个逃犯.The escapee's turnup is expected soon.预料很快就会出现逃亡者.Why do you always shoot him? He is not the No.1 escapee.你怎么老是拍他,他又不是一级逃犯....
Rotate the head clockwise and counterclockwise.按顺时针方向转动头部，然后再逆时针旋转。The dance moves in a counterclockwise direction.这支舞是按逆时针方向跳的。Do the vanes in the figure rotate clockwise or counterclockwise?图中叶片的旋转方向是顺时针的,还是反时针的?...