胚细胞和糊粉层中的代谢活性立即活跃起来.Metabolic activity quickly develops in the cells of the embryo and the aleurone layer.这些囊胚细胞, 称卵裂球, 每个细胞都有一套二倍体染色体组.The cells of the blastula , called blastomeres, also each receive a full diploid set...
Hughes finished with 15 seconds in hand.休斯提前了15秒完成。A thief can break into a car in under ten seconds.窃贼十秒钟之内就能把车撬开.All five - second grenade fusewill burn down in three seconds.所有定制为五秒的手雷导火索都会在三秒内烧完.She's already sh...