您要查找的是不是：
- Helium and neon are inert gases. 氦和氖為惰性氣體。
- The antimatter equivalent of helium. 反氦與氦等價(jià)的反物質(zhì)
- Helium was discovered on the sun. 氦是在太陽(yáng)上發(fā)現的。
- Most big balloons are now filled with helium. 現在許多大氣球中充的是氦氣。
- A fountain of helium spurt out of the tube. 有一股氦的噴泉從小管中噴出。
- Helium is a gas used in balloons. 氦是一種用于氣球的氣體。
- Atoms of hydrogen are fused to make helium. 氫原子可熔合成氦。
- The element of helium was first found in the sun. 氦元素最初是在太陽(yáng)里發(fā)現的。
- You can be a helium hea without even trying. 你真是個(gè)大傻瓜，甚至連試都不試一下。
- Hydrogen provided more lift than helium. 氫氣的上升性能優(yōu)于氦氣。
- It gets the hydrogen and helium right. 根據結果表示，氫元素和氦元素都比較正常。
- Helium is a monatomic chemically inert gas. 它是單原子惰性氣體。
- Remember, helium has no warning properties! 記住，氦沒(méi)有警告性特征。
- Helium and argon are monatomic gases. 氦和氬都是單原子氣體。
- Helium gas was the thermometric fluid. 氦氣是測溫液體。
- What are the purposes of helium and nitrogen gas? 氦氣與氮氣在這套系統中有何作用？
- One safety catch in his design is its helium coolant. 這次設計中采用的一個(gè)安全措施就是使用氦冷卻劑。
- Humans possess no senses that can detect the presence of helium. 人類(lèi)沒(méi)有能夠探測到氦的存在的官能。
- He plans to circumnavigate the world in a helium balloon. 他計畫(huà)搭乘氦氣球環(huán)繞世界一周。
- A pillow stuffed with feathers; balloons filled with helium. 用羽毛裝滿(mǎn)的枕頭；裝滿(mǎn)氦氣的氣球
