Definition

Examples

• 这个气球里面是氦，所以它能飞起来。
  Zhège qìqiú lǐmiàn shì hài, suǒyǐ tā néng fēi qǐlai.
  This balloon is filled with helium, so it can fly.
• 他们在实验室里用氦做实验。
  Tāmen zài shíyànshì lǐ yòng hài zuò shíyàn.
  They use helium to do experiments in the lab.
• 空气比氦重，所以气球会上升。
  Kōngqì bǐ hài zhòng, suǒyǐ qìqiú huì shàngshēng.
  Air is heavier than helium, so balloons rise.