DICT.TW Dictionary Taiwan

 catch on
 抓住,挂在…上;理解,受歡迎,流行開來

 catch on
      v 1: understand, usually after some initial difficulty; "She
           didn't know what her classmates were plotting but
           finally caught on" [syn: get wise, get onto, tumble,
            latch on, cotton on, twig, get it]
      2: become popular; "This fashion caught on in paris"