sophomore slump
2年目のジンクス
Regression toward the mean
Second-system effect
/suto3/google.iconsophomore slump
/suto3/Google画像検索.iconsophomore slump
/suto3/Google定義検索.icon sophomore slump
/suto3/wikipedia.iconsophomore slump
/suto3/weblio.icon sophomore slump
/suto3/kotobank.icon sophomore slump
/suto3/jisho.icon sophomore slump