(1)翻译:本句包含“not..unti..”句式,该句中 until为介词,其后一般接表示(2)的名词或名词性短语。此外,until还可作连词,用于引导(3)从句。Not until recently did they encourage the development of tour-ist-related activities in the rural areas.直到最近他们才鼓励在农村地区开展与旅游业有关的活动。