The prospect of having to pay a graduate tax until retirement would kill the students' enthusiasm stone dead.想到今后一直到退休为止都要缴毕业税，学生们的积极性会被彻底打消。Mr Dean carried on his baking business until he retired.迪安先生做烘焙生意一直到退休。He was born in Hong Kong where he subsequently practised as a lawyer until his retirement.他出生在香港，后来在那里从事律师工作，直到退休。