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rem.的英文翻譯是什么意思，詞典釋義與在線(xiàn)翻譯：
英英釋義
名詞 rem:
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a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
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(Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays
