Shortly after implantation the blastocyst wall, the trophoblast, consists of two layers of cells.植入之后不久,胚囊的壁, 即滋养细胞含有两层细胞.The blastocyst is then surgically introduced into the uterus of a foster mother.然后通过手术把胚囊引进寄养母体的子宫...
螃蟹的螯the claws of a crab植物由于具有螯合机制可能影响土壤的化学特性.Plants may possibly influence soil chemistry by the possession of chelating mechanisms.确定螯合 -- 溶剂萃取法所得到的检测限颇为困难.It is difficult to define the detection limits obtained by chel...
The doll-like figures in these stories are unlike anybody, let alone oneself.这些故事中的玩偶形象跟谁都不像,更不用说像自己了。It is a very rewarding exercise to work this out oneself.独自解决这个问题是一次受益匪浅的锻炼。It is better to die oneself than to kill.宁...
Marriages in medieval Europe were customarily arranged by the families.在中世纪的欧洲,婚姻通常是由双方的家庭安排的。They customarily went into battle side by side with their men.他们向来都同士兵并肩作战.Customarily, he began the day in Tokyo with an inte...