toehwahaneun
retrogressive
rétrograde (dans le sens d'évolution) ; régressif
퇴화하는 세포는 정상적인 기능을 잃어버린다.
toehwahaneun seponeun jeongsangjeogin gineung-eul ilh-eobeolinda.
Retrogressive cells lose their normal function.
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