由于含汞，萤光灯泡应予以回收，不能作为垃圾直接丢弃。
Because of the mercury, fluorescent bulbs are supposed to be recycled, rather than dumped in the trash.
萤光灯泡内有少量汞，其被加热后变成气态，与其他气体起反应形成光。
Inside a fluorescent bulb, a tiny amount of mercury is heated until it turns into a gas that reacts with other gases to produce light.
20世纪90年代初，卤素灯泡的价格因竞争激烈而下跌，严兆强由此转向生产节能萤光灯泡，这是一个很大程度上为大厂商所忽视的市场。
When halogen prices dropped amid fierce competition in the early 1990s, Mr. Yan switched to making compact-fluorescent bulbs, a market largely ignored by bigger manufacturers.
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