It's from my pen pal George in Australia.它是我在澳大利亚的笔友乔治写来的.Please tell your pen pal what your neighborhood is like.请告述你的笔友你的邻居是什么样的人." Please put me in contact with a pen - pal, badge or stamp collector. "请将我列在 交笔 友,...
The microspore culture technology has been widely applied in Brassica species nowadays.随着芸苔属作物小孢子培养技术的日趋成熟,应用范围也越来越广泛.Meiosis of microspore mother cells is synchronous or unsynchronous.小孢子母细胞减数分裂同步或不同步.Complete disintegr...
动物学家把螺蛳归入甲壳类.Zoologists refer barnacles to Crustanceans.卢布克爵士最近指出, 小型甲壳类中有几种较好的例子,可作为这一法则的说明.Sir. J . Lubbock has recently remarked , that several minute crustaceans offer excellent illustration of this law.它们吃其他的鱼类 、 甲壳...