系统反射

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. As Valentines day approaches, remember, its the thought that counts. Just ask a decorated cricket. Because according to a study published in the January

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(一)月

Grafting is a way to produce plants from pieces of existing plants instead of seeds. Branches or buds are cut from one plant and placed on a related kind of plant. The branch or bud that is grafted is called the scion. The plant that accepts the graf

发表于:2019-01-12 / 阅读(60) / 评论(0) 分类 2010年VOA慢速英语(五)月

By Phuong Tran Dakar, Senegal 13 August 2007 Ousmane Sembene, the Senegalese film director and novelist who died this past June at age 84, is widely known as the father of African cinema. But before he was recognized for films that protested coloniz

发表于:2019-02-05 / 阅读(109) / 评论(0) 分类 2007年VOA标准英语(八月)

By Selah Hennessy Dakar 11 June 2007 Senegalese filmmaker Ousmane Sembene is being buried in Dakar as praise is being showered from across the world on his career. Selah Hennessy reports from Dakar his death at the age of 84 also leaves a void, revea

发表于:2019-02-08 / 阅读(90) / 评论(0) 分类 2007年VOA标准英语(六月)

China says a multi-billion dollar oil deal with Iraq is still being negotiated. This contradicts reports last week from Iraqi officials, who said the deal had been signed. Daniel Schearf reports from Beijing. China's Foreign Ministry on Thursday sai

发表于:2019-02-11 / 阅读(49) / 评论(0) 分类 VOA标准英语2008年(九月)

Lesson 231 You owe me one! 1.You owe me one!你欠我一个人情! 2.I stil lowe for the car.我还没付清 这辆车的钱。 3.I owe ou an apology.我该向你道歉。 4.I owe my parents a lot.我十分感激 父母。 5.I owe you five dollars.我

发表于:2019-02-12 / 阅读(58) / 评论(0) 分类 辛沛沛NO-BOOK 辛沛沛傻瓜机口语极短句