Tonight PBS will air a documentary called "Democracy In Action".
今晚PBS电台将播放一部名为《民主进行时》的纪录片。
Take action, have your say, claim your right to clean air.
行动起来，争取呼吸清洁空气的权利。
Firmer action will be taken against factories discharging smoke into the air.
将采取更坚决的行动来对付那些不断把浓烟放到空气里的工厂。
I hate all this hot air. What I want is action.
我讨厌这些空谈，我要行动。
The purification of a substance by exposure to the mechanical or chemical action of air.
物质暴露于空气中，通过机械作用或化学反应使其纯化。
The purification of a substance by exposure to the mechanical or chemical action of air.
物质暴露于空气中，通过机械作用或化学反应使其纯化。
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