减速（英文：decelerate;retard;put a break on;slow down），指降低速率；慢下来。
释义
1、降低速度。
2、慢下来。
例句
当他尽力想减速的时候，自行车开始冒烟了。
When he tried to slow down , it began to smoke .
The World Bank expects the fastest contraction of trade since theDepression .
然而，找寻宇宙早期曾经减速膨胀的直接证据还是非常重要的。
Nevertheless , it is important to look for direct evidence of an earlier ,slowing phase of expansion .