细胞的这种向里推进标志着原肠胚形成的开始.This pushing - in of cells marks the start of gastrulation.外胚层囊胚的外层,在原肠胚形成之后生后外胚层组织.The outer layer of a blastula that gives rise to the ectoderm after gastrulation....
他们在俱乐部相会是为了联谊和寻求建议。They meet at the club for companionship and advice.战争使吉姆和玛丽相会了.Jim and Mary were flung together by the war.两河相会时汇流在一起.The two rivers mingle their waters when they join....
成车的食物、毯子与其他必需品抵达了该市。Truckloads of food, blankets, and other necessities reached the city.壁橱最下面的抽屉里还有一条多余的毯子。There's an extra blanket in the bottom drawer of the cupboard.她坐在扶手椅中，身上裹着毯子。She was sitting in an armchair...