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 ...
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....