When the tide ebbs it's a rock pool inhabited by crustaceans.退潮时，它便成为甲壳动物居住的岩石区潮水潭。The tide ebbs and flows twice in 24 hours.潮水每24小时涨落两次.Progenitive force ebbs , stillborn foetus, strange embryo increases.繁殖力衰退,死胎 、...
方法: 用浑浊法测定体系的分层曲线,自动电位滴定仪测定平衡两相中醋酸的含量,通过绘制出的三元相图,筛选萃取剂.Methods: Using the turbidity method and analyzing the acetic acid concentration of both phases at equilibrium....
台钳上有刻痕的虎钳牙帮助它紧咬住工件.The scored jaws of a vise help it bite the work.工件已经上了车床.The workpiece is already on the lathe.我们只是用磨床将工件抛光和精加工.We used grinding machines only to smooth and finish a workpiece....