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...
The main bone of contention is the temperature level of the air-conditioners.争来争去无非是空调温度。During hot weather, the city's electrical system is often overloaded by fans and air conditioners.天气炎热时, 这座城市的电力系统常常因电风扇和空调器的使...