他减慢速度，向左急转。He reduced speed and turned sharp left.河水在平坦的河床上减慢了流速.The river slows on the flat bottom.机器逐渐减慢了转速,终于停住了.The machine slowed down and stopped....

“减慢”的反义词：加快。...

“减慢”的英语可以翻译为：[计] slower ...