可吸入颗粒物(Particular matter less than 10 un,PM 10):指悬浮在空气中,空气动力学当量直径(10微米的颗粒物空气中的颗粒物来历广泛,扬尘、细菌、毛发、头屑...
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pm 10 pollution pm污染
pm 10 air sampler pm空气采样器
pm 10 concentration pm浓度
pm 10 concentrations pm浓度
pm 10 heavy air pollution pm重污染
Our school until 10 pm 我们晚上10点才放学
Library closed 10 pm 图书馆晚上10点闭馆
If you want to go to bed at 10:30 pm, you might set a timed dimmer switch at 10 pm.
如果想晚上10点半睡觉,你可以在晚上十点设置一个定时渐暗开关。
The number of TV viewers between 8 PM and 10 PM.
电视观众的人数在晚上8点到10点之间急剧上升。
Heavy rain pelted Beijing from around 10 PM on Tuesday, ending what had earlier been a sunny day.
星期二的时候,北京从晚上10点钟左右就开始下起暴雨,第二天早些时候雨就停了,阳光明媚。
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