Practices have proved that effective gas extraction can improve ventilation management, gas control and reliability of work safety in the mine.

实践证明，通过对矿井瓦斯的有效抽采，可以使矿井的通风管理、瓦斯治理工作稳步提高，矿井安全可靠度增强。

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We also need to improve the ventilation in our office to help prevent headaches, smells, sore throats, stuffiness and dustiness.

我们也需要改善办公场所的通风来预防头疼、不良的气味、嗓子疼、鼻塞和灰尘。

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Efficient ventilation and sound air current are significant to improve indoor air quality, control the contamination concentration, and ensure the realization of healthy and comfort air-condition.

有效地通风和合理的气流组织对于改善室内空气品质，控制室内污染物浓度，保证实现健康建筑、健康舒适性空调有着重要的意义。

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Mr Paolucci said plans to improve the ventilation and counter the threat from humidity in the Chapel would be unveiled soon.

BBC: Sistine Chapel ceiling at 500: The Vatican's dilemma

In the meantime, you can improve the ventilation at your seat by turning on the overhead air vent to low and positioning the airflow to be slightly in front of your face.

CNN: Commentary: Flu and your health on a plane