发表于:2018-11-27 / 阅读(494) / 评论(0) 分类 赖世雄教你学唱歌

When humans have a heart attack, heart muscles die after being cut off from their blood supply. But what if the heart could grow new muscle to replace the dead tissue? Some amphibians can regrow body parts, even entire limbs. But humans and other hig

发表于:2018-12-16 / 阅读(216) / 评论(0) 分类 VOA标准英语2011年(三月)

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 arm [ B:m ] He received a call to arms

发表于:2018-12-30 / 阅读(75) / 评论(0) 分类 每日攻克5词

Kleenex is a brand name for facial tissues, bathroom tissue, paper towels, and diapers. The name Kleenex has become a noun in many dictionaries, meaning a facial tissue, whatever the brand. The Kimberly-Clark Corporation created Kleenex tissues in 19

发表于:2019-01-01 / 阅读(44) / 评论(0) 分类 各大品牌英文介绍

发表于:2019-01-04 / 阅读(192) / 评论(0) 分类 英文歌曲第四辑

Beating Heart Tissue from Stem Cells In a study in the journal Science, researchers explain how they used mouse embryonic stem cells and microchip technology to create heart muscle tissue that actually beats. Cynthia Graber reports One of the goals o

发表于:2019-01-30 / 阅读(82) / 评论(0) 分类 60秒科学