The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphere(n.[地]岩石圈)is divided into a few dozen plates o

发表于:2018-12-08 / 阅读(393) / 评论(0) 分类 新概念优美背诵短文50篇

Unit 6 Eating and drinking [00:14.73]student book page 27 [00:18.60]Let's act [00:20.85]Sam,bring me a bowl.Bring me some milk,too [00:35.19]Give it to Kitty,Sam. [00:39.99]student book page 28 [00:45.74]Let's talk [00:47.10]I'm hungry.I want some br

发表于:2018-12-13 / 阅读(167) / 评论(0) 分类 沪教版牛津小学英语二年级

Idiom: nick of time 关键时刻出现,千钧一发,恰好时刻 Hit the book: Volcano Volcanologist Erupt Core Liquid Mantle Magma Crust Plate

发表于:2018-12-27 / 阅读(59) / 评论(0) 分类 趣味青春英语

今天还是要继续讲两个在大选期间新闻界常用来报道选战形势的习惯用语。你知道哪一种运动是美国人日常用语最丰富的源泉呢?是美国最风行的球类运动:棒球。今天要说的两个习惯用语都

发表于:2019-01-09 / 阅读(107) / 评论(0) 分类 美国习惯用语

在美国每年棒球季节的第一场比赛相当于春天来临的信息。说真的,这一百多年来最得美国大众青睐的运动就是棒球,而棒球运动也成了习惯用语的丰富来源。我们今天就专讲一些出自棒球运

发表于:2019-01-09 / 阅读(112) / 评论(0) 分类 美国习惯用语

ARI SHAPIRO, HOST: The American dinner plate today is an exercise in variety, and that's thanks in part to a man named David Fairchild. He was a government botanist at the end of the 19th century. Back then, meals were mostly about sustenance, and Fa

发表于:2019-01-16 / 阅读(25) / 评论(0) 分类 2018年NPR美国国家公共电台2月