1868, coined from Greek helios "sun" (see sol), because the element was detected in the solar spectrum during the eclipse of Aug. 18, 1868, by English astronomer Sir Joseph N. Lockyer (1836-1920) and English chemist Sir Edward Frankland (1825-1899). It was not actually obtained until 1895; it was assumed before that to be an alkali metal, hence the ending in -ium.
实用例句
1. Helium is a very light gas.
氦是一种非常轻的气体。
来自柯林斯例句
2. Helium is a gas used in balloons.
氦是一种用于气球的气体.
来自《现代汉英综合大词典》
3. Unlike helium - 4, it cannot be produced by radioactive decay.
与氦 - 4不同之处是, 氦-3不能由放射性衰变产生.
来自英汉非文学 - 科技
4. The helium - 3 apparently became trapped when the earth was formed.
显然,当地球形成时,氦 - 3就被圈闭了.
来自英汉非文学 - 科技
5. After hydrogen, the atom with the simplest structure is that of helium.
