プログレッシブ和英中辞典(第4版)の解説
げんそく【減速】
deceleration; reducing speed; a slowdown
減速する slow down; decelerate; reduce one's speed
車を時速40キロに減速する
reduce [decrease] the speed of a car to 40 kilometers an hour／bring [slow] a car down to 40 kilometers an hour
減速経済
decelerated economy; a slowdown in economic activities
減速材［剤］
a moderator
減速装置［歯車］
a reduction gear