puffs

abbr. 被动的水下发射控制的现实性研究(=Passive Underwater Fire Control Feasibility System)

例句与用法：

There was a puff of steam from the engine before it stopped.

机车喷出一股蒸气后就停了下来。

She stubbed out the cigarette after the first puff.

她只吸了一口就把香烟掐灭了。

His speech was just puff.

他的发言尽是吹捧而已。

He blew out the candles with a single puff.

他一口气吹灭了蜡烛。