vertical drain

例句：

1. 1. The construction crew had todig a vertical drain to access the foundation.
   施工队不得不挖一个垂直排水沟来到达地基。
2. 2. The city has installed severalvertical drains to prevent flooding during heavyrains.
   城市已经安装了几条垂直排水沟，以防止大雨时发生洪水。
3. 3. Theengineer designed a vertical drain that would efficientlyremove water from the basement.
   工程师设计了一条垂直排水沟，能够有效地从地下室排出水。