HomeDictionary快速动眼期快速动眼期WordREM sleepTraditional快速動眼期Copy wordkuài sù dòng yǎn qīkuai4su4dong4yan3qi1Hear itMeaningREM sleep CC-CEDICTCharacters in 快速动眼期快kuài速sù动dòng眼yǎn期qī