Tā zhěngtiān wán yóuxì, yèhuāngyúxī, chéngjì zìrán xiàhuá.
He plays games all day — his studies suffer from amusement, so his grades naturally slip.
Tips
history
From Han Yu's 韩愈 essay 《进学解》 (Tang dynasty): '业精于勤，荒于嬉；行成于思，毁于随' — 'A vocation is perfected through diligence and ruined through play; conduct is built through reflection and destroyed through following the crowd.' One of the most-quoted lines in classical Chinese on education.
usage
Almost always cited together with its other half 业精于勤 (yèjīngyúqín, 'a vocation is perfected through diligence'). Standard exhortation in school speeches and parental lectures.
