鲟鱼和长嘴鱼都是硬鳞鱼.Sturgeons and gars are ganoid.硬鳞鱼在更早的地质时期数量巨大.Ganoid fishes swarmed during the earlier geological periods.陆龟的背甲高而呈圆盖形;后肢粗大, 形如象腿;前肢覆以硬鳞.Tortoises have a high, domed shell, heavy elephant - like hind legs, and...
锌置换了稀酸中的氢.Zinc displaces the hydrogen of dilute acids.可以观察到植物组织中阳离子置换能力的提高.An increase in cation exchange capacity of the tissue should be observed.对缓慢置换,假设的时龄分布函数变得不重要.For slow replacement the age distribution function ...
a lake, still and serene in the sunlight阳光下宁静安谧的湖水He has entered the serene autumn of his life.他已进入了美好的中年时期.She has a lovely serene face.她有一张可爱而安详的脸....
They joked and drank coffee and filled themselves with chocolate cake.他们开着玩笑，喝着咖啡，尽情地吃着巧克力蛋糕。'I wish you made as much fuss of me,' Vera joked.“我倒真希望你也能这么好好地关心我一下，”薇拉打趣道。They joked about his ineptitude.他们取笑他的笨拙....