弘扬国学 · 传承文化

helium

英 ['hiːlɪəm] 美 ['hilɪəm]

解释

n. [化学] 氦（符号为He，2号元素）

※ 提供单词"helium"的中文意思、发音示范及音标对照，中英文词源、例句和用法等。

中文词源

helium 氦，氦气

来自希腊语helios,太阳。因这种元素发现于太阳光谱中而得名。

英文词源

helium (n.): 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.

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例句和用法

1. Helium is a very light gas.: 氦是一种非常轻的气体。

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

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.

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.

5. After hydrogen, the atom with the simplest structure is that of helium.: 在氢元素之后, 氦的原子结构最简单.