retarder是什么意思

n.阻滞剂,缓凝剂,减速器

1、The train was equipped with a retarder, which helped it slow down smoothly.
这列火车配备了减速器，能够使其平稳减速。
2、Aircraft landing gear may incorporate a hydraulic retarder to reduce the landing impact.
飞机起落架可能会采用液压减速器来减小着陆时的冲击。

迟滞器；延时器；减速器