修正变分原理

14 the Daffodil principle

the Daffodil principle Several times my daughter had telephoned to say, Mother, you must come to see the daffodils before they are over. I wanted to go, but it was a two-hour drive from Laguna to Lake Arrowhead I will come next Tuesday, I promised a

发表于:2018-12-07 / 阅读(174) / 评论(0)

每天一点英文

VOA标准英语2012--Mosquitoes Genetically Modified to Prevent Malaria

Mosquitoes Genetically Modified to Prevent Malaria There may soon be a new weapon in the fight against malaria - a genetically-modified mosquito that kills the disease-causing parasite once it becomes infected. Malaria is a leading cause of death wor

发表于:2018-12-16 / 阅读(43) / 评论(0)

VOA标准英语2012年(一月)

英语语法：149 “Principal” Versus “Principle”

Grammar Girl here. Today were going to recall that the principal is indeed your pal, but well also see that a principal can be so much more. In this episode well talk about the various ways to use principlethats p-l-eand principalthats p-a-l. (These

发表于:2019-01-02 / 阅读(57) / 评论(0)

英语语法 Grammar Girl

Genetically modified cows

Jen: Hello and welcome to 6 Minute English from BBC Learning English. I'm Jen and with me today is Neil. Neil: Hello there. Jen: Todays story is all about allergies. If you have an allergy to something, your body reacts to it in a negative way. Do yo

发表于:2019-01-07 / 阅读(63) / 评论(0)

六分钟英语

商务英语－Pareto's Principle - The 80-20 Rule

Pareto's Principle - The 80-20 Rule How the 80/20 rule can help you be more effective. In 1906, Italian economist Vilfredo Pareto created a mathematical formula to describe the unequal distribution of

发表于:2019-01-21 / 阅读(72) / 评论(0)

实用英语

学个词Learn a Word 第648期 Special interest

今天我们要学的词是special interest。 Special interest, 特殊利益集团，特别是指通过影响政策或立法来谋取私利的团体。 U.S. Treasury Secretary Geithner unveiled new rules to limit special interest influence over the

发表于:2019-02-07 / 阅读(39) / 评论(0)

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