| raphe |
a ridge that forms a seam between two parts
출처: wordnet.princeton.edu/perl/webwn
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| random |
lacking any definite plan or order or purpose; governed by or depending on chance; "a random choice"; "bombs fell at random"; "random movements" taken haphazardly; "a random choice"
출처: wordnet.princeton.edu/perl/webwn
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| rapid eye movement |
paradoxical sleep: a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
출처: wordnet.princeton.edu/perl/webwn
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| rapid eye movement sleep |
paradoxical sleep: a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
출처: wordnet.princeton.edu/perl/webwn
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| rappel |
(mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body lower oneself with a double rope coiled around the body from a mountainside; "The ascent was easy--roping down the mountain would be much more difficult and dangerous"; "You have to learn how to abseil when you want to do technical climbing"
출처: wordnet.princeton.edu/perl/webwn
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