抓住,掛在…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"