将反洗排水阀(V - 4)，空气洗净阀(V - 2)置于[开]，进行空气清洗并持续一段时间。
Turn on back wash drainage valve (V-4) and air scour valve (V-2). Air scour lasts for a moment.
山里的空气清新，能让生活在繁忙都会的城市人洗净城市尘嚣，让人感觉心旷神怡。
The air in the mountain is so fresh that can make the busy citizens be far away from the hubbub and feel way above par.
正如潇洒的夏日之雨，幽默可洗净浇凉地面，空气和你。
Like a welcome summer rain, humor may suddenly cleanse and cool the earth, the air and you.
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