单词：permeable subsoil
透水底土
单词：permeable subsoil 相关文章
The Green Alley program is an effort to reduce flooding, save energy and decrease heat in the city. Transcript of radio broadcast: 13 July 2008 This is the VOA Special English Development Report. An environmental project in the American city of Chic
发表于:2019-01-11 / 阅读(142) / 评论(0)
VOA慢速英语2008年（七）月
VOA慢速英语2008年（七）月