helium variable

例句：

1. 1. Helium is a noble gas with unique properties.
   氦是一种具有独特性质的惰性气体。
2. 2. The helium variant of the molecule has a different structure.
   该分子的氦变体结构不同。
3. 3. The helium variant is used in medical devices to reduce pain.
   氦变体用于医疗设备中，以减轻疼痛。