减低速度 meaning in Chinese

deccelarate
retard
slow up/down
speed down

Already several of pursuers had had to reduce speed .
有几艘追击舰已经不得不减低速度。
Slack up before you reach the crossroads
驶近十字路口时要减低速度。
The driver lessened his speed
驾驶员减低速度。
Warning government agencies holds the most promise for saving lives , researchers say , because they would give train operators time to slow down trains or bridge officials the opportunity to turn on metering lights to keep as many vehicles as possible off bridges
警告政府部门对于救助生命来说最有希望，研究者说道，因为他们能给足够的时间使火车驾驶者减低速度或者桥梁工作者以机会打开指示灯使得尽可能多的交通工具远离桥梁。