音标:[ˈbækɡraund səbˈtrækʃən] ;
[医]本底扣除

You Do the Math Hello and welcome to Words and Their Stories from VOA Learning English. On this program we explain how to use common expressions in American English. We also explore the origins of these expressions. Where do they come from? Today we

发表于:2018-12-16 / 阅读(109) / 评论(0) 分类 2016年VOA慢速英语(十)月

He has a background in classical music. 他有古典音乐的背景。 have a background in something就是指有某方面的背景。 I have a background in special education.我有特殊教育的背景。

发表于:2018-12-25 / 阅读(48) / 评论(0) 分类 蒋健棠英语实用句子

This is Scientific Americans 60-second Science, Im Cynthia Graber. This will just take a minute. I still tend to move my fingers almost subconsciously when doing arithmetic. Well, that might be not so strange according to research published in the Ma

发表于:2019-01-08 / 阅读(51) / 评论(0) 分类 Scientific American(五)月

EDUCATION REPORT - After 40 Years, Calculators in School Still Add Up to Debate By Nancy Steinbach / Broadcast: Wed, 7 Nov 2007 16:00:00 UTC This is the VOA Special English Education Report. Can you do the math: What is one hundred times four, divid

发表于:2019-01-11 / 阅读(35) / 评论(0) 分类 VOA慢速英语2007年(十一)月

Q: Lately I have struggled to get out of bed despite waking up a decent time to go to my lab (I'm a grad student), the end result being I fall asleep again and end up going in about 11.5 hours later than I really want to. How do I make myself actuall

发表于:2019-02-06 / 阅读(76) / 评论(0) 分类 阅读空间

New Words 新单词 concrete adj. 具体的 addition n. 加 subtraction n. 减 multiplication n. 乘 division n. 除 frequently adv. 频仍地 withdraw v. 掏出 formula n. 公式,程式 plus prep. 加 minus prep. 减 compound v. 合成 times n. 倍

发表于:2019-02-25 / 阅读(87) / 评论(0) 分类 实用英语