一种想法的雏形the embryo of an idea现代自行车的雏形the prototype of the modern bicycle他的机械计算机是现代电子计算机的雏形.His mechanical calculating engines were the antecedents of the modern computer....
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 ...