旧卡车突然出现回火，声音像放爆竹一般。

EXAMPLE: The old truck made a sudden backfire which sounded like a firecracker.

春节早晨，开门大吉，先放爆竹，叫做“开门炮仗”。称为“满堂红”。放炮吃饺子，又长了一岁呀。

The Spring Festival in the morning, open the door, first off firecrackers, called "open the door the firecracker went off". Called "winning". While eat dumplings, and older ah.

经商人家，放爆竹还有另一番意义：他们在除夕之夜大放炮仗是为了新的一年大发大利。

Business people, firecrackers and another meaning: they put firecrackers on New Year's eve night for the New Year with Italy.

因此，每到新年前的一天，人们就在墙上和门上贴红对联、门神画，挂红灯笼，放爆竹，用来威吓和驱赶怪兽。

Hence, everyone pasted red couplets and images of the door god on walls and doors, hung red lanterns and set off firecrackers to scare the monster away.