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亿万人同时迁徙，只为一次团圆。
vt. 聚集，集合，装配
vi. 集合，聚集
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- These days, fireworks are a big business and there are now over 800 fireworks companies in the Liuyang area.
- 现在的烟花可是门大生意，浏阳地区现有烟花公司800多家
- Dancing Fireworks is a 20-year-old family run company. It now employs 1,600 people.
- 东信烟花厂是一家20年的家族企业。现在有雇员1600人
- By far the most popular fireworks the Dancing factory makes are what are known as display shells.
- 目前东信烟花厂制造的最流行的烟花就是所称的礼花炮
- These are for huge events like the Beijing Olympics, which Dancing supplied.
- 像北京奥运这种大活动用的就是东信的礼花炮
- Display shells like the ones in this wirehouse got to 300 metres and explode into massive starbursts.
- 这房子里的这种礼花炮能打上300米高，爆成大片火花
- And they are still largely made by hand in factories like this.
- 而它们仍然多数采用手工制作，工厂就像这样
- The workers at Dancing produce an extraordinary 2.7 million shells a year, that's one shell every 12 seconds.
- 东信的工人们每年惊人地生产270万花炮，相当于每12秒造一发花炮
- Each shell is made of a dome of pressed cardboard, with a time delay fuse stuck in with string and glue.
- 每个花炮都用球状纸板包住，塞进延时引信后，再用绳子和胶水封住
- The Dancing factory doesn't just assemble fireworks, it also comes up with new designs for the global market.
- 东信烟花厂不仅组装烟花，它也会迎合全球市场推出新设计
- One of the main ingredients used make gunpowders is a chemical called saltpetre.
- 制作火药的一种主要原料，就是一种化学品叫，硝
- They use to get it from bat droppings found in caves.
- 以前是要到洞穴里从蝙蝠粪中提取的
- Nowadays, they make it synthetically but the principles are about the same.
- 现如今可以靠人工合成了，但背后的原理也差不多
- The science behind fireworks, however, that's really involved.
- 然而烟花里面的科学才是真正重要的
- And I've been given special permission to come here, to the factory development lab to take a look.
- 我得到特殊允许来到这里，进入工厂的实验室一探究竟
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