keen on

熱衷于 有興趣的

LIlya is keen on dancing but her farther was not allow

莉亞熱衷于舞蹈但是她父親并不允許

(as) keen as mustard

(Brit. informal)extremely eager or enthusiastic

(英，非正式)極熱心的，極熱切的；極熱情的