There was very little evidence of economic gloom here at the 20th annual Supercomputing conference. 在今年举行的第二十届年会上，基本上看不出什么经济低迷的迹象。
By the 20th day after mating, almost all the treated ewes had lost their embryos, but none of the controls had. 到第二十天时，几乎所有经过处理的羊都失掉了它们的胚胎，而那些有吗啡寡聚核苷酸抑制的母羊则没有。
