火线 (huǒ xiàn) — (military) battle line, firing line; (electrical) live wire

Definition

Examples

• 士兵们勇敢地冲上了火线。
  Shì bīng men yǒng gǎn dì chōng shàng le huǒ xiàn.
  The soldiers bravely charged onto the firing line.
• 修理电器前一定要先关掉火线。
  Xiū lǐ diàn qì qián yí dìng yào xiān guān diào huǒ xiàn.
  Before repairing electrical appliances, be sure to disconnect the live wire first.
• 他在火线上受了伤，被送回了后方。
  Tā zài huǒ xiàn shàng shòu le shāng, bèi sòng huí le hòu fāng.
  He was wounded on the firing line and was sent back to the rear.