Of the many puzzles mathematicians ponder, one is new ways to tie knots. There are more than six billion different types of knots that have been tabulated by mathematicians. Six billion. David Leigh, a chemist at the University of Manchester in the U

发表于:2018-12-24 / 阅读(51) / 评论(0) 分类 2017年Scientific American(一)月

There was once a farmer who lived near a road. It was not a busy road, but from time to time, cars passed the farm. Near the farm gate, there was a large hole in the road. This hole was always full of

发表于:2019-01-03 / 阅读(75) / 评论(0) 分类 英汉幽默故事选读

Larry和李华今天去给他们的朋友Jim买结婚礼物。Jim下个周末就要结婚。今天李华会学到两个常用语:to tie the knot和drop-dead gorgeous. LL: I can't believe Jim is goin

发表于:2019-02-01 / 阅读(56) / 评论(0) 分类 美国之音《流行美语》

音乐咖啡厅:Rihanna再度牵手Justin Timberlake(Hole In My Head) Artist:Rihanna Song:Hole In My Head [00:06.66]You got a hole in your head [00:09.79]You got a hole in your head girl [00:13.10]You got a hole in your head [00:16.19]You got a h

发表于:2019-02-08 / 阅读(124) / 评论(0) 分类 音乐咖啡厅

There was once a farmer who lived near a road. It was not a busy road, but from time to time, cars passed the farm. Near the farm gate, there was a large hole in the road. This hole was always full of water, and the drivers of the cars could not see

发表于:2019-02-08 / 阅读(57) / 评论(0) 分类 趣味英语

Down the Rabbit Hole Alice and her big sister were sitting on the grass. Her sister was reading a book, but Alice had nothing to read. She looked at her sister's book again. There were no pictures in it. What good is a book without pictures? She wond

发表于:2019-02-08 / 阅读(75) / 评论(0) 分类 趣味英语