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...
The area is a treasure house of archaeological relics.这个地区是古文物遗迹的宝库。Archaeological finds have been made one after another.地下文物迭有发现.His paper was published in the proceedings of the Kent Archaeological Society.他的论文已在肯特考古学...
那匹马前蹄腾空向后仰，把骑手摔了下去。The horse reared and threw off its rider.马蹄在泥地里留下了深深的蹄印。The horse's hooves left deep indentations in the mud.他甩了个响鞭，马儿就奋蹄向前奔去。He cracked his whip and the horse leapt forward....