helium
英['hiːliəm]
美['hilɪəm]
近义词he
- 氦
词态变化
复数: heliums;
双语例句
- 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.