Health and activity condition each other.

健康与活动是互为条件的。

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Age and health do not always condition each other.

年龄与健康并不总是互为条件的。

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The temperature and pressure condition each other.

温度和压力互为条件。

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But if globalisation is the most important change in the exercise of power in our age, then our increasing interdependence on each other is the key condition that governs our existence as individuals.

BBC: News | UK Politics | Paddy Ashdown's speech

This is a new feature, available on some defibrillator-like devices that are now on the market, which is aimed at people with a form of heart condition that causes their two ventricles to beat slightly out of phase with each other.

ECONOMIST: Case history

This is a potentially deadly condition in which the individual chambers of a heart beat out of phase with each other.

ECONOMIST: Model behaviour