To train a rat, the experimenter placed it in an operant conditioning chamber: a small plastic box with a lever at one end.

为了训练小鼠，实验人员把它放在一个操作性条件反射室：一个一端置有操作杆的塑料箱。

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An interesting example of applying a variable refrigerant flow system for air conditioning and hot water production in a high end hotel in Milan.

这是一个关于米兰的一家高级宾馆的案例，其采用可调冷媒系统进行空气调节和卫生热水的生产。

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The rotary adjusting, personalized air conditioning air blast end device belongs to the heat air conditioning field.

一种旋转调节型个性化空调送风末端装置，属于暖通空调技术领域。

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Kersee has designed Felix's training to improve her burst out of the starting blocks, her conditioning and her top-end speed.

WSJ: Allyson Felix's Olympic Hedge

It can end up in artificial water supply systems, including air conditioning systems, water services and cooling towers.

BBC: Legionnaires' Disease bacteria

Though the posher hotels had swimming pools, golf courses and nightclubs, this was a magnet for Jews of all classes, and many families and their friends returned to the same hotels or rooming houses year after year, until air conditioning, affluence and cheap air travel made alternatives available and brought the enchanted little world to an end.

ECONOMIST: Lexington