Definition

Examples

• 空气中大部分是氮气。
  Kōngqì zhōng dà bùfen shì dàn qì.
  Most of the air is nitrogen.
• 焊接时要用氮气保护金属。
  Hànjiē shí yào yòng dàn qì bǎohù jīnshǔ.
  When welding, you need to use nitrogen to protect the metal.
• 食品包装里常充入氮气来保鲜。
  Shípǐn bāozhuāng lǐ cháng chōngrù dàn qì lái bǎoxiān.
  Food packaging is often filled with nitrogen to keep it fresh.