...人员密集空间环境,空气污染物, [gap=1012]：volatile organic compounds (VOC),human exhaled breath,indoor air quality (IAQ),environment with crowded people,air pollutant, ..
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Because it is crowded with people and their vehicles, the environment is not as clean as I would like it to be.
因为挤满了人和车辆，所以它的环境没有我所希望的那么干净。
My boss drove a "car" just has 2 wheels going to CARREFOUR with me, oh, so much much people. We couldn't bear so noisy and crowded environment that took a packet of paper at random and went out.
老板蹬着两轮车带我去家乐福，里面人山人海，我们受不了那个人挤嘈杂的环境，拿了一包纸赶紧往外跑。
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