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- helium isotrope 氦同位素
- Helium and neon are inert gases. 氦和氖为惰性气体。
- The antimatter equivalent of helium. 反氦与氦等价的反物质
- Helium was discovered on the sun. 氦是在太阳上发现的。
- Most big balloons are now filled with helium. 现在许多大气球中充的是氦气。
- A fountain of helium spurt out of the tube. 有一股氦的喷泉从小管中喷出。
- Helium is a gas used in balloons. 氦是一种用于气球的气体。
- Atoms of hydrogen are fused to make helium. 氢原子可熔合成氦。
- The element of helium was first found in the sun. 氦元素最初是在太阳里发现的。
- You can be a helium hea without even trying. 你真是个大傻瓜，甚至连试都不试一下。
- Hydrogen provided more lift than helium. 氢气的上升性能优于氦气。
- It gets the hydrogen and helium right. 根据结果表示，氢元素和氦元素都比较正常。
- Helium is a monatomic chemically inert gas. 它是单原子惰性气体。
- Remember, helium has no warning properties! 记住，氦没有警告性特征。
- Helium and argon are monatomic gases. 氦和氩都是单原子气体。
- Helium gas was the thermometric fluid. 氦气是测温液体。
- What are the purposes of helium and nitrogen gas? 氦气与氮气在这套系统中有何作用？
- One safety catch in his design is its helium coolant. 这次设计中采用的一个安全措施就是使用氦冷却剂。
- Humans possess no senses that can detect the presence of helium. 人类没有能够探测到氦的存在的官能。
- He plans to circumnavigate the world in a helium balloon. 他计画搭乘氦气球环绕世界一周。
