职业与环境肺部疾病：来自工作，家庭，户外及其它暴光的疾病。
Occupational And Environmental Lung Diseases: Diseases From Work, Home, Outdoor And Other Exposures.
暴光的时间照相机快门打开并让光线进入所需的或能允许的时间长度。
The length of time required or permitted for a camera shutter to open and admit light.
然后广告客户按照一个叫做CPM(每千次展示费用)的费率付费换取他们的广告短片向间接受众暴光的权利。
Advertisers then pay a rate, called CPM (cost per thousand), for the right to expose the implied audience to their spot.
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