1·It contained very little hydrogen and helium.
它含有非常少的氢和氦。
2·The loss of helium on Earth would affect society greatly.
地球上氦的减少将对社会产生重大影响。
3·A regulatory agency should ensure that helium is used carefully.
应该有一个监管机构确保氦的使用是谨慎的。
4·Deflated values also mean that natural gas extractors see no reason to capture helium.
放气值也意味着天然气提取器认为没有捕获氦的需要。
5·By selling the helium, the government can not only pay off that debt but reduce its overall debt as well.
政府通过出售氦不仅可以偿还债务，还可以减少总体债务。
1·The pressure of the helium inside a blimp is about the same as that of the air outside, so the gas does not rush out.
气球飞艇内部氦气的压力和外部气压相近，因而气体不会溢出。
2·The inner envelope filled with helium in the head section of the blimp and the third built-in airbag at the tail is filled with ethane combustible gas.
飞船头部的内置气囊中充满了氦气，而置于尾部的第三节内置气囊则充满了乙烷可燃气体。
3·The Congress is ignorant of the consequence of fire sale: global helium prices are so artificially deflated that few can be bothered recycling the substance or using it judiciously.
国会对廉价出售的后果一无所知：全球氦气价格被人为压低，以至于几乎没有人愿意回收这种物质或明智地使用它。
4·He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.
他还发明了高空吊运车，这是一种为飞机和大型的氦气球的空中救援系统。
5·When it decays, it becomes a stable form of helium.
当它衰变时，它以稳定的氦气形式存在。