Amphetamines is one kind of synthetic compounds whose precursor structure is amphetamine.苯丙胺类物质是一大类人工合成的以苯丙胺为母体的化合物.Methedrine and amphetamine can and will freeze your mind and kill your body.没太得灵和安非他命能够让你失心丧命.a form of ...
女性有时因过度使用磨砂膏而损伤了皮肤。Women sometimes damage their skin by going overboard with abrasive cleansers.这种新护肤香膏受到了 中年 妇女的欢迎.The new skin balm was welcome by middle - aged women.医生给伤口涂了些油膏, 伤口很快就愈合了.The doctor applied an unguent ...
the expansion and contraction of the metal金属的膨胀与收缩Contraction of the timbers left gaps in the fence.木料收缩,结果围墙露出缝来.The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡....