seal off

• 短语动词，指完全封闭或封锁某个区域、场所或容器，以防止人员进出或内容物泄漏。

A phrasal verb meaning to close or block an area or container completely to prevent entry, exit, or leakage.

不可数 · 及物 · 短语动词，可分

1. Close or block accessformal

   To prevent people from entering or leaving an area, usually for safety or security reasons.

   封锁

   • The police sealed off the street after the accident.
   • The building was sealed off due to a gas leak.
   • Authorities sealed off the area to investigate the crime scene.

   同义词barricadeblockadeclose offcordon offencloseisolatequarantineshut off

   反义词openunblockunseal

2. Make airtight or watertightformal

   To close something completely so that air, water, or other substances cannot pass through.

   密封

   • They sealed off the pipe to prevent water from leaking.
   • The container was sealed off to keep the contents fresh.
   • He sealed off the windows to stop the draft.

   同义词caulkclose upcorkplugsealstop up

   反义词openunseal

基本动词seal