a在健康饮食中肉是必要的,同样的蔬菜对健康也很有好处 In the healthy diet the meat is necessary, the same vegetables also very much have the advantage to the health[translate] a无需进行锆铪分离 Does not need to carry on the zirconium hafnium separation[translate] ...
Typical refractory metals are tungsten, tantalum, molybdenum, niobium, hafnium, chromium, vanadium, zirconium and titanium. As a refractory metal, the most important advantage of tungsten is that it has good high-temperature strength and good corrosion resistance to molten alkali metals and vapors. ...