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快速喝下；一口喝下。

To drink quickly; to gulp; to down.

通常用拳头重击。

To hit very hard, usually with the fist.

参与临时拼车；为通勤形成临时、非正式的拼车,基本上是拼车通勤和搭便车的变体。

To take part in casual carpooling; to form ad hoc, informal carpools for commuting, essentially a variation of ride-share commuting and hitchhiking.

通过从枪管的较大部分到较小部分,直径减少或形状改变。

To become reduced in diameter, or changed in shape, by passing from a larger to a smaller part of the bore of the barrel.