[网络] 雪貂周围

This is Scientific Americans 60-Second Science, Im Cynthia Graber, this will just take a minute. Our ears are highly attuned to sounds in the world around us. Its not just the frequency of the sound itself. There are also subtle differences and shift

发表于:2018-12-24 / 阅读(83) / 评论(0) 分类 Scientific American(一)月

A: 欢迎大家来到这期的美语训练班! 我是杨琳! B: 我是Mike! 杨琳,来告诉大家今天都要学什么? A: 没问题! 今天,我们要带你去看看在美国看病有什么不同,聊聊怎么为工作面试做准备,还要告诉

发表于:2018-12-25 / 阅读(64) / 评论(0) 分类 美语训练班