Although some gangsters escaped the siege via storm-water drains, others are reported to have been ferried out in police cars.

虽然有些匪徒经由雷雨涵洞排水道逃避了警察围攻，但是据报导更多匪徒已经上了警车被送往拘押。

youdao

24once the city's main water source, the Los Angeles River is now a concrete channel fed by storm drains.

曾经作为城市主要水源的洛杉矶河，现在是一条混凝土渠道，用于暴雨排水渠。

youdao

There is the rubbish that comes from the land, delivered by run-off, storm water drains and the wind-blown rubbish that people leave behind.

CNN: The stark reality of a throw-away society