The publisher expected the book to sell 1,500 copies, tops.出版商预计该书至多能卖出1,500本。The tops of the trees rippled in the breeze.树冠在微风中婆娑摇曳。Wires criss-cross between the tops of the poles, forming a grid.电线杆顶端的电线相互交错,形成电线网。...
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....