Evolution can explain why human embryos look like gilled fishes.进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样.A sharp demarcation of adventive embryos from zygotic embryos cannot be drawn.不定胚与合子胚之间不能划分出明显的界限.Most grass embryos have a fla...
Evolution can explain why human embryos look like gilled fishes.进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样.Early division phase embryos may use metabolites provided by the suspensor, persistent and degenerating synergids.早期分裂时期的胚可以利用胚...
She cried and raved for weeks, and people did not know what to do...她哭喊了好几个星期，人们不知如何是好。Rachel raved about the new foods she ate while she was there.雷切尔对她在那里吃的新奇食物赞不绝口。Rachel raved about the new foods she ate while she wa...
在恶劣的条件下，皮肤可能会开裂并流脓。In severe cases, the skin can crack and weep.她赤裸的双脚上满是一道道的泥污，都冻得开裂了。Her bare feet were dirt-streaked and cracked with cold.大地开裂，汩汩冒出炽热的熔岩。The ground had opened to disgorge a boiling stream of molten la...
他在十年间由办公室勤杂员升至总经理.He rose from office boy to managing director in ten years.过去的十年间,物价一直在上涨.Prices have risen steadily during the past decade.在过去五十年间, 地球一直在转暖.For the last fifty years, the globe has been warming up....
The sword and mace were favourite weapons for hand-to-hand fighting.剑和狼牙棒是肉搏战的最佳武器。Keeping the same lustful look , she unhooking her small mace.她却卸下她的小锤子,继续用欲望的眼神看着马库斯.The Speaker is preceded by the mace-bearer upon his ...
We electrified the main circuits to see if the fuses would blow.我们把主要电路通上电,看看保险丝是否会烧断.Lead fuses at a low temperature.铅在低温下就熔化.Conception occurs when a single sperm fuses with an egg...受孕发生在单个精子与卵子结合的时候。Charles lit the f...