It may effectively reduce the HC emissions to use a catalyst with low light-off temperature, close-coupled catalyst, HC traps, second air injection and electrically heated catalyst.
采用如低起燃温度催化剂、密耦催化剂、HC捕集器、二次空气注入和电加热催化剂等在内的排气后处理技术，可以有效地减少污染物尤其是HC的排放。
Before going to bed, turn off the light and put mosquito killer in the center of room and start it to make photo catalyst have a wider irradiation scope for better result.
在睡觉前先关好灯，将灭蚊器置于房间中心位置开启，使光触媒灯管照射到的地方更广，效果更加理想。
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