Infra - red absorption takes place only when there is a change of dipole moment.

红外吸收峰仅在有偶极矩变化时才能实现。

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Common types are dielectric moisture meter, infra-red absorption type moisture meter, etc.

常用的有介电水份计，红外线吸收式水份计等。

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Moisture meter: An instrument to measure the moisture content of paper. Common types are dielectric moisture meter, infra-red absorption type moisture meter, etc.

水份计：测量存在于纸张内的水份含量的仪器。常用的有介电水份计，红外线吸收式水份计等。

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But the strength of the greenhouse effect depends on the chemical composition of the atmosphere, because the phenomenon is due to the absorption of infra-red radiation by various gases in the air.

ECONOMIST: Climate change: Getting real | The

Heavy-lidded eyes cast down, he concentrates intently on a book, with the deep, swirling folds of his enveloping red cloak serving as a visible metaphor for the cocoon of his ecstatic absorption.

WSJ: Separated at the Altar | Piero della Francesca in America | Frick Collection | By Karen Wilkin