1. 减速：通常枪管只向后移动几毫米,又可细分为枪管减速(Decelerate)和枪栓加速(Accelerate)两类. 前者如1911A和几乎所有今天市场上的有名手枪,等在枪管脱锁之后,便卡在枪身上不再移动. 滑套则继续向后移动. M2五零机枪则属于枪栓加速型,

2. 减低：deceive 欺骗 | decelerate 减低 | deceleratedflow 减速流

3. (使)减速：decelerability /减速能力/减速性能/ | decelerate /(使)减速/ | deceleration /减速/

4. 制动：decelerability 减速能力 减速性能 | decelerate 制动 | deceleratedmotion 减速运动

5. decelerate：decel; 降低速度

1. 降低速度;减速行驶（或动转）
    When a vehicle or machine decelerates or when someone in a vehicle decelerates, the speed of the vehicle or machine is reduced.

    e.g. ...the sensation of the train decelerating.
           列车正在减速的感觉

2. (通货膨胀、经济增长等的速度)减缓，放慢
    When the rate of something such as inflation or economic growth decelerates, it slows down.

    e.g. Inflation has decelerated remarkably over the past two years.
           过去的两年里通货膨胀已经明显放缓。

1. reduce the speed of

    e.g. He slowed down the car

    Synonym: slow down

2. lose velocity
    move more slowly

    e.g. The car decelerated

    Synonym: slowslow downslow upretard