1·And how is it known that Mars had hafnium-187?
那么是如何知道火星有铪- 187的呢？
2·The first they dealt with by coating the top of the device with oxides of hafnium, molybdenum and titanium, in layers about 100 nanometres thick.
第一，他们在装置的上处理和涂上铪，钼，钛氧化物层，这层物质仅有100纳米厚。
3·Mainly because the quantity of hafnium, utilized in one chip, is negligibly small.
这主要是因为数量的铪，利用一个芯片，是微乎其微的小。
4·Perhaps the most important use of sodium metal is as a reducing agent in producing high melting point metals, such as titanium and hafnium.
也许金属钠最重要的用途是作为还原剂生产高熔点金属，比如钛和铪。
5·A new process of metallurgy of rare metals zirconium and hafnium with caustic soda instead of sodium carbonate to rub up zircon is examined.
研究了以氢氧化钠代替碳酸钠拌和锆英砂冶炼锆、铪稀有金属的新工艺。