The extra typing required to open and close tags and escape special characters not only wastes time, but introduces more possibility for error.
起始和结束标签以及转义特殊字符都需要额外录入，不仅浪费时间还会造成更多的错误。
Besides, what people should pay attention to is that used battery, the light tube of daylight lamp, mercury thermometer, paint pot and medicine are all toxic wastes, which need special disposal.
另外，需要注意的是，废电池、日光灯管、水银温度计、油漆筒、药品等都是有毒垃圾，需要特别的处理。
Each factory has to have special equipment to take care of dangerous chemical wastes.
每个工厂都需要有特殊的设备来处理有害的化学废料。
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