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....
If we'd been patented nobilities we should have had infinite trouble.如果咱们是受封的贵族,那这个麻烦可就大啦.This marriage further strengthened the kinship ties family to the other important nobilities of Bhutan.通过联姻进一步加强了国王与不但其他政治势力之...