English Slang collection：

　　the bee's knees

　　[释] the best;

　　[例] That deal was the bee's knees.;

　　before long

　　[释] soon;

　　[例] You'll be a great dancer before long as you were born for dancing.;

　　behind bars

　　[释] in jail;

　　[例] You'll be put behind bars if you keep getting into trouble.