在照相底板上不同的同位素的离子会聚于不同点.Ions of different isotopes converge at different points on the photographic plate.在铅块上方某一距离处放一照相底板.Some distance above the lead block a photographic plate is placed.百里茜大声尖叫着, 猛地扑倒在马车的底板上, 婴儿被压在下面.Pr...
The results show that the surfactants added and the surface active substances from effect the losser.结果发现除了一般的浮选条件以外,废纸浆中的表面活性剂和来自废纸的表面活性物质与浮选损失有着重要的关系....
I spent lots of money on smart new outfits for work.我花大笔钱购置了上班时穿的漂亮新套装。Come on over, we've got lots of the old gang here.过来吧，好多老朋友都在这儿。You see studs on lots of London front doors.在伦敦，你能看到许多人家的大门上都装有饰钉。...