Homogamy occurs in the closed cleistogamous flowers that appear late in the season in certain plants.导致发生自花授粉的可能性很大.Cleistogamous plants produce flowers which either open only partly or not at all.闭花受精植物产生的花只是部分地开放或完全不开放...
A bare fallow can be used with a herbicide such as glyphosate or amitrole.对荒秃的休耕地可以使用象镇草宁或杀草强一类的混合除草剂.At present the company's main products are glyphosate.目前公司主营产品为草甘膦.The reformation of mother liquor concentration...
Antarctic air brought biting cold to southern Chile on Thursday.周四，南极气流给智利南部带来了刺骨的严寒。Both Chile and Argentina feel very strongly about their territorial claims to Antarctica.智利和阿根廷对于南极的领土主张都持强硬态度。As new mines come on str...