In forced-air heating and cooling systems, ducts carry hot or cold air to different parts of home.

在强制热风和冷风系统中，通风管道将热空气的冷空气输送到家里不同的地方。

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The forced air convection oven heats food and beverages by conduction with a hot plate or by forced convection.

强制对流型烤箱通过热盘传导或强制对流加热食物和饮料。

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They forced air into his lung.

他们把空气吹入他的肺里。

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Earlier this year, however, a mid-air accident forced him to take to his blog.

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An allergic reaction to pollen in the air forced the 22-year-old player to retire from a game at the Serbain Open on Friday.

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In his valedictory speech given in mid-campaign Mr Gates lambasted his European allies for the slow progress against a puny opponent and for failing to invest in the capabilities that America was forced to provide, such as air-defence suppression, ISTAR (Intelligence, Surveillance, Target Acquisition and Reconnaissance) and aerial refuelling.

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