Results In normal fetus, the urorectal septum ( URS ) descended, its distance to cloacal membrane decreased gradually.结果 泄殖腔发育过程中,胎龄15d前 的正常鼠胚, 尿直肠隔将 泄殖腔 分为腹侧的尿生殖窦和背侧的直肠两部分, 二者共同相通于泄殖腔管....
Her untimely return could spoil Miss Melville's entire programme for the evening.她提前回来可能会破坏掉梅尔维尔小姐今晚的整个计划。His mother's untimely death had a catastrophic effect on him...他母亲的早逝给了他沉重的打击。...an untimely visit from ...
The BOD test is essentially a bioassay procedure.BOD试验实际上是一项生物测定方法.The bioassay of freshwater sediment toxicity is described.描述了淡水沉积物毒性的生物测试方法.The field bioassay of 4 trunk injection insecticides ( 14 % Imidacloprid + DD...