Radium can be used to treat cancer.镭可以用来治疗癌症.Radium can be fixed some distance from its original source.镭在离它的原始母体一定距离上固定下来.He was the discoverer of the element radium.他是镭元素的发现者.Radon is the daughter of radium.氡是镭的子体....
他拒绝给儿子钱.He denied the money to his son.他拒绝给他们 长期 信贷.He refused to grant them long - term credits.他真是个狡诈的辩论家，总是拒绝给出直截了当的回答。What a shifty arguer he is, refusing ever to give a straight answer....
It is characterized by the lubricity of typical fluorocarbons.它的特点是具有典型氟碳聚合物的润滑性.D Punching Oil BS also contains anti corrosion & lubricity additives.壳牌冲孔油bs含有防腐蚀添加剂 和 油性添加剂.Nylon is good wear proof ability, self - lubri...