烟火作为信号被广泛应用于各种领域，比如在军事上，用来示意敌军的到来。
They used their fireworks as signals for many things such as signaling that another army was approaching.
每家都准备一棵大圣诞树，在圣诞树上挂上各种漂亮的装饰品，燃上蜡烛，在树下放着互相赠送的礼物和卡片。人们欢聚一堂，吃大餐，燃放烟火。
The people have Christmas trees with beautiful decorations on it and candles lighting up. They send presents and CARDS. And they have a big dinner and set off fireworks.
届时，将举办各种音乐会、烟火晚会、座谈会和展览等活动。当然，少不了纪念“大卫”500岁生日的官方版T恤。
There will be concerts, fireworks, symposiums and exhibitions. There is, of course, an official David 500 T-shirt.
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