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The ratio of outgoing light to incoming light after a given ray passes through a medium is called the transmittance, its value defined as:，更多细节参见PDF资料
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Context manager that's used to automatically delete a queue when it's no。电影对此有专业解读
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Cllr Susan McGill said: "We can't wait to welcome fans and artists to our amazing city for an unforgettable celebration of world-class live music set to the stunning backdrop of Stirling Castle.