牛和绵羊血液孕酮含量在全妊娠期保持不变.Blood progesterone remains constant throughout pregnancy in the eve.血液孕酮含量在全妊娠期保持不变.Blood progesterone remains constant throughout pregnancy.许多口服避孕法即使用合成的孕酮.Many forms of oral contraception use a synt...
她开始对写小说有些厌倦了。She had begun to be a little bored with novel writing.尽管身体越来越虛弱, 他仍然继续写小说.Despite increasing physical frailty, he continued to write stories.要写小说, 必须不断辛勤劳动.To write a novel, one must keep pegging away at it ...
Serveral of commonly used methods are photoprinting, photoengraving , mechnical engraving, and stencil.通常所采用的几种储存方法是:影印法 、 照相蚀刻 、 机械雕刻和模板.stencil pen(刻蜡纸的)铁笔Squeegee: A rubber blade used in screenprinting to push the ink...