随着越来越多的人向往自然，崇尚简单和谐的生活方式，该县户外经济蓬勃发展，其收入有望在明年年底达到全县总收入的百分之十二。(expect)

As an increasing number of people long for nature and embrace simple and harmonious lifestyles, the outdoor economy prospers in that county, whose income is expected to take up 12 percent of the total income of the county by the end of next year.

考查时间状语从句、名词短语、动词短语和定语从句。根据句意以及句子的提示词可知，该句应为连词As表示 “随着……” 引导的时间状语从句，在该从句中，表示 “越来越多的人” 应为名词短语an increasing number of people；表示 “向往” 应为动词短语long for；表示 “崇尚简单和谐的生活方式” 应为动词短语embrace simple and harmonious lifestyles；在主句中，表示 “那个县的户外经济很繁荣” 可译为the outdoor economy prospers in that county；后接关系代词whose引导定语从句，对先行词county的修饰，表示 “有望做某事” 应为动词短语be expected to do；表示 “达到全县总收入的百分之十二” 应为动词短语take up 12 percent of the total income of the county；表示 “明年年底” 应为介词短语by the end of next year。故翻译为：“As an increasing number of people long for nature and embrace simple and harmonious lifestyles, the outdoor economy prospers in that county, whose income is expected to take up 12 percent of the total income of the county by the end of next year.”。