首先，禁止燃放烟火有利于保证空气质量。

First, banning fireworks is good for keeping air quality.

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他们也被用来燃放烟火以庆祝一些重大事件。

They are also used in firework displays to celebrate great events.

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大街上民众燃放烟火，欢乐起舞。 空气中混杂着汽笛声和枪声。

That prompted fireworks, dancing in the streets and a symphony of car-honking and gunshots fired in the air.

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