New Yorkers have been stocking up with bottled water.纽约人一直在贮备瓶装水。Some shops are bowing to consumer pressure and stocking organically grown vegetables.一些商店迫于顾客的压力，开始供应有机蔬菜。He noticed a wrinkle in her stocking.他注意到她长筒袜上有一道...
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...