The new drainage system was installed last week.

新的排水系统上周安装了

The engineer designed a drainage system that lies belowground.

工程师设计了一个位于地下的排水系统。

Sewer workers are responsible for maintaining the city's drainage system.

下水道工人负责维护城市的排水系统。

We need to improve the drainage system to prevent floods.

我们需要改善排水系统以防止洪水

We should check the drainage system before the rainy season.

在雨季之前我们应该检查排水系统

He used a conduit to channel the rainwater into the drainage system.

他使用了一根导管将雨水引导到排水系统中。

The drainage system couldn't handle the water, so the streets became waterlogged.

排水系统无法处理这么多水，街道因此被淹了。

The duct for the drainage system must be properly sealed to prevent leaks.

排水系统的管道必须妥善密封以防止泄漏。

We must ensure that there is no backflow in the chemical plant's drainage system.

我们必须确保化工厂的排水系统中没有液体倒流现象。