在数到8的时候，将肺部所有空气排出。

Try to get all the air out of your lungs by the time you count to 8.

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当我们呼气的时候，肺将空气排出体外。

When we exhale we expel air from our lungs.

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这台机器将空气排出气槽并形成真空状态。

This machine forces air out of the tank and creates a vacuum.

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The main goal of the respiratory system is to bring fresh in so that you can extract oxygen from it, and blow used air out so that you can rid of carbon dioxide which is the end product of carbon metabolism inside our bodies.

呼吸系统的主要功能是,吸入新鲜空气,以便获得空气中的氧气,呼出废气,以便排出二氧化碳,二氧化碳是人体内碳代谢的终产物

耶鲁公开课 - 生物医学工程探索课程节选