This pushing - in of cells marks the start of gastrulation.细胞的这种向里推进标志着原肠胚形成的开始.The outer layer of a blastula that gives rise to the ectoderm after gastrulation.外胚层囊胚的外层,在原肠胚形成之后生后外胚层组织....
为了混合或者调制而使之进入一种通常是圆周的运动状态.Both of approaching and returning movements are along the tangent of the circle.采用管件和管道制造商推荐的工具. 所有工具必须能够实现完美圆周的压紧作业.Use tools recommended by fitting and tubing manufactures. All tools must make...
这个公司不得不采取一些措施扭转下滑的运势。The company had to do something to reverse its sliding fortunes.他们谈到扭转历史潮流。They talked of reversing the tide of history.比赛在第56分钟时发生了扭转。The game turned in the 56th minute....