This house is poorly ventilated.
这个房子的通风不好。
In poorly ventilated dwellings, indoor smoke can be 100 times higher than acceptable levels for small particles.
在通风不良的住所，室内烟雾会比可接受的微小颗粒水平高出100倍。
In poorly ventilated dwellings, indoor smoke can exceed acceptable levels for small particles in outdoor air 100-fold.
在通风不良的住所，室内烟雾可超过可接受的微小颗粒含量，比室外空气高100倍。
Spills would also be a health risk, since carbon dioxide is heavier than air, and so can build up in low-lying or poorly ventilated spots.
二氧化碳泄漏会带来健康风险。由于二氧化碳比空气重，因此可以在低洼地区和通风差的地区累积。
For months thousands of people were housed in temporary trailers which were poorly ventilated and contained high levels of formaldehyde.
几个月来成千上万的群众居住在通风不畅，高甲醛含量的临时住所内。
How can you expect to control it when patients are sent home from hospital to sleep in a crowded, poorly ventilated room with 10 other people?
如果病人从医院回到家以后与十几个人住在通风不良的房间中，我们怎么可能控制结核病呢？
How can you expect to control it when patients are sent home from hospital to sleep in a crowded, poorly ventilated room with 10 other people?
如果病人从医院回到家以后与十几个人住在通风不良的房间中，我们怎么可能控制结核病呢？
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