For nearly 130 years, the worlds scientists have used a singular small, metal cylinder to define the exact weight of a kilogram. But that is about to change. The cylinder was made in 1889 of platinum and iridium metals. It is called the Grand K. The

发表于:2018-12-08 / 阅读(38) / 评论(0) 分类 2018年VOA慢速英语(十一)月

This is Scientific American 60 Second Science, I am Steve Mursky, Got a minute? Obese people have higher risks for diabetes, heart disease, arthritisand injuries in car accidents? Yes, in part because theyre far less likely to wear a seat belt. Thats

发表于:2018-12-24 / 阅读(54) / 评论(0) 分类 Scientific American(四)月

数量 Quantity (一) Let's talk about the problem of quantity. 我们谈谈数量的问题吧。 You'll issue a certificate of quantity and weight. 你们必须出具数量和重量证明书。 The package number and quantity are identical with

发表于:2019-01-06 / 阅读(55) / 评论(0) 分类 实用英语

英语新词:这些meter后缀单词 你理解对了么? anemometer n. 风力计,[气象] 风速计。 audiometer n. [耳鼻喉] 听度计,听力表;测听计;音响测定器。 barometer n. [气象] 气压计;晴雨表;显示变化的事物

发表于:2019-01-14 / 阅读(82) / 评论(0) 分类 英文语法词汇

A joint geological expedition of 27 members from China, France and Italy has discovered another tiankeng, or giant sinkhole cave, in south China's Guangxi Province. A 350-meter-deep pit with nearly vertical walls... The newly-discovered tiankeng look

发表于:2019-02-05 / 阅读(130) / 评论(0) 分类 cctv9英语新闻2017年

Todd: Mike, you're giving tips about weight training and we've talked about upper body. Now what about lower body and legs? I actually don't want to lift weights with my legs. I just... It is OK if I just skip it? Mike: Well, you should do your legs

发表于:2019-02-06 / 阅读(30) / 评论(0) 分类 原版英语对话1000个