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Sentence
Span Details
睡眠
sleep; slumbernoun, no-adjective
中
medium; average; middle; in; within; among; during; while; throughout; currently doing; in the process of; under; middle way; moderation; second volume (of three); junior high school; middle school; Chinanoun, suffix
の
possession, attribution, nominalizer, or nominal linkergrammar
急速
rapid; fast; quickna-adjective, noun
眼球運動
eye movement; ocular movementnoun
は
topic markergrammar
レム睡眠
REM sleepnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
特徴
feature; trait; characteristicnoun
だ。
plain copulagrammar