[数] 二次曲线的共轭直径

Grammar Smart(3)

Male: I think we better 1) review. Female: Yup good idea. Male: OK, the most important rule, the one that all the others serve to protect and 2) execute is that verbs and their subject must agree. Sin

发表于:2018-11-28 / 阅读(122) / 评论(0)

疯狂英语2002年

英语语法：186 Is “Ain't” a Word?

Grammar Girl here. Today's topic is ain't and a few other troublesome contractions. To quote the famous opening lines of the first-ever talking picture, The Jazz Singer: Wait a minute, wait a minute! You ain't heard nothin' yet! You may have been chi

发表于:2019-01-02 / 阅读(79) / 评论(0)

英语语法 Grammar Girl

英语语法：188 Lay Versus Lie

图片1 Today's topic is lay versus lie. Lay Versus Lie First, we'll do the easy part, which is the present tense... If you exclude the meaning to tell an untruth and just focus on the setting/reclining meaning of lay and lie, then the important dist

发表于:2019-01-02 / 阅读(65) / 评论(0)

英语语法 Grammar Girl

研究表明:我们利用人类大脑的前脑区域学习语言

Study: We Learn Language in Pre-Human Area of Brain From VOA Learning English, this is the Health Lifestyle report. A new study from brain researchers helps explain how the human brain evolved, or changed over time, to permit people to speak and writ

发表于:2019-01-03 / 阅读(50) / 评论(0)

2018年VOA慢速英语(八)月

与美国小学生一起学英文第9册第25期:直径

Diameter 直径 A diameter is a straight line inside a circle. 直径是圆内的直线。 Can any straight line in a circle be a diameter? 圆内的任何直线都是直径吗？ No, its two ends must meet at two different points on the circle. 不是

发表于:2019-01-10 / 阅读(38) / 评论(0)

与美国小学生一起学英文第9册

VOA标准英语2008年-Iconic Former Samsung Chief Spared Prison Time

One of South Korea's most powerful business leaders has avoided a prison sentence for alleged corruption. A South Korean court agrees the former chairman of Samsung evaded taxes, but it threw out more serious charges. VOA's Kurt Achin reports from S

发表于:2019-02-02 / 阅读(30) / 评论(0)

VOA标准英语2008年（七月）

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actual useful years

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automatic range tracking

badly-behaved