黄铁矿很多,并且含钴,在硫化物块体中成稠密的斑块.Pyrite is more abundant and cobaltiferous and occurs in heavy patches in the sulfide mass.喷气发动机中65%的特殊耐热金属材料是用钴制造的.Sixty - five percent of the special heat resistant metal in a jet engine is made...
an organization of byzantine complexity拜占庭式复杂诡秘死板的机构the increasing complexity of modern telecommunication systems日益复杂的现代电信系统a problem of mind-boggling complexity复杂得难以想象的问题...