某些植物的珠被和珠心细胞形成完全正常的胚.The cells of the integument and nucellus of some plants form perfectly normal embryos.大多数被子植物的胚珠有两层珠被, 而裸子植物通常只有一层.Most angiosperm ovules possess two integuments, while gymnosperms usually have only ...
Objective To evaluate the the portal hypertensive gastropathy and the existence of spontaneous splenorenal shunts.目的探讨自发性脾肾分流对门静脉高压性胃病的影响.In turn this leads to gastric mucosal injury and portal hypertensive gastropathy.反...
Dena lit a cigarette, trying to mask her agitation.德娜点燃了一根烟，试图掩饰不安。He had no wish to uproot Dena from her present home.他没想过让德娜离开现在的家去别处居住。He went and poured a brandy for Dena and brought it to her.他走过去为德娜倒了一杯白兰地，端到她跟前。De...