他吃起东西来肚子像个无底洞。He's a bottomless pit as far as food is concerned.战争把许多青年男子吞进了它的无底洞.The war swallowed up many young men into its maw.嘴是无底洞.If it were not for the belly , the back might wear gold....
幻日现象经常在北极和南极出现.Sundogs are fairly common occurrences in the Arctic and Antarctic.包含冰晶的高空云所形成黯淡的幻日隐约可见.The high clouds containing the ice crystals are faintly visible as are some sundogs....
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...