outdoor trench

例句：

1. 1.The construction crew was working on the outdoor trench when it rained heavily.
   施工队在户外沟渠工作时，突然下起了大雨。
2. 2. The engineers had to dig out the outdoor trench to clear the debris.
   工程师们不得不挖开户外沟渠来清除杂物。
3. 3.The military had to repair the outdoor trench to prevent further flooding.
   军队不得不修复户外沟渠以防止进一步的洪水。