种间杂交的主要障碍是F1代的不育性.A major barrier to interspecific hybridization is sterility in the F 1 progeny.因此,向日葵细胞质雄性不育性的研究备受关注.That is why cytoplasmic male sterility ( CMS ) in sunflower is the research focus through years....
珠宝商在他的店铺后面有一间作坊。The jeweller has a workroom at the back of his shop.一九五七年,这个作坊改成了工厂.In 1957 the shop was turned into a factory.丽蒂是作坊师傅的重孙女, 和巴丝谢芭年龄相仿.Liddy, the master's great - granddaughter , was about Bathsheba&#...
Brodie cuffed him on the side of the head.布罗迪拍了一下他的头。Brodie put out his tongue at her.布罗迪朝她做了个鬼脸.An unidentified man did a brodie last night.一名姓名不详的男子昨晚跳河自杀....