helium的例句

1. Helium is a very light gas.: 氦是一种很轻的气体。

2. Atoms of hydrogen are fused to make helium.: 氢原子可熔合成氦。

3. Helium is a gas used in balloons.: 氦是一种用于气球的气体。

4. It contained very little hydrogen and helium.: 它含有非常少的氢和氦。

5. Hydrogen turns into Helium, which releases energy.: 氢变成氦的时候会释放能量。

6. 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。

7. So you are saying that Helium was discovered on the sun first.: 所以你是说，氦最初是在太阳上被发现的。

8. 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。

9. 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。

10. National Helium Reserve to liquidate its helium assets by 2015 regardless of the market price.: 无论市场价格，国家氦储备局将在2015年之前清算其氦资产。

11. Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.: 氦是钍和铀元素数千年放射性衰变的副产品。

12. 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。

13. Another important attribute is the unique boiling point of helium, which is lower than that of any other element.: 另一个重要的特性是氦的独特沸点，比其他任何元素的沸点都低。

14. 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。

15. The Jovian planets have very thick atmospheres consisting of varying amounts of hydrogen, helium, methane, and ammonia.: 木星的行星有非常厚的大气层，且由不同数量的氢、氦、甲烷和氨等元素组成。

16. In fact, 24 per cent of our galaxy elemental mass consists of helium, which makes it the second most abundant element in our universe.: 事实上，银河系中24%的元素质量是由氦组成的，这使它成为宇宙中第二丰富的元素。

17. 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。

18. All existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands.: 现有的所有氦供给应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途优先于其他商业或娱乐需求。

19. Firstly, all existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands.: 首先，所有现有的氦供应应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途应优先于其他商业或娱乐需求。

20. 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。

21. However, the amount of helium in the universe, as measured by spectroscopy, suggests that there are far more baryons in the universe than estimates based on galactic luminosity indicate.: 然而，通过光谱学测量，宇宙中氦的数量表明，宇宙中重子的数量要比基于星系光度所估计的要多得多。

22. Stars like our sun fuse hydrogen in their cores into helium.: 太阳一类的恒星在其核心将氢聚变成氦。

23. GIANT inflatable helium balloons.: 巨大的充气氦气球。

24. Where did this man get the helium?: 这个人是从哪儿得到氦气的呢？

25. So what is the charge on a helium nucleus?: 那么氦原子核的电荷量是多少呢？

26. If helium loses on electron, what do we have?: 如果氦原子失去了一个电子，我们得到了什么？

27. The balloon may be filled with helium or hydrogen.: 气球中可能会充满氦气或者氢气。

28. 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。

29. Clearly, helium has the least polarizable electron cloud.: 显然，氦的可极化电子云最小。

30. Previous observations had traced only incoming helium atoms.: 以前的观测只追踪了氦原子。

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