幼鲸长出一层厚厚的鲸脂，以抵御寒冷的海水。The baby whale develops a thick layer of blubber to protect it from the cold sea.恰恰为了从鲸脂中获得有价值的油,鲸鱼遭到捕猎.It is for the valuable oil in blubber that whales are hunted.曾经有一段时期,捕鲸不仅仅是为了它的鲸脂,也为了它的骨头.Once ...
螃蟹的螯the claws of a crab植物由于具有螯合机制可能影响土壤的化学特性.Plants may possibly influence soil chemistry by the possession of chelating mechanisms.确定螯合 -- 溶剂萃取法所得到的检测限颇为困难.It is difficult to define the detection limits obtained by chel...
Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid.表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来.The slowness is dissolve in hydrofluoric acid and hot oil ofvitriols.缓慢溶于氢氟酸...