Have You Met the Perfect Tenses?

Editors note: This is the third episode of four-part series on verb tenses. Be sure to listen to part one and part two first. For VOA Learning English, this is Everyday Grammar. Today we are going to talk about the perfect verb tenses. Perfect tenses

step by step 第二册 lesson 1

UNIT 21 RADIO PROGRAMS( Ⅰ ) Lesson41 Part Ⅰ UNIT 21 RADIO PROGRAMS( Ⅰ ) Lesson 41 Part Ⅰ Warming-up Exercises Place Names Ankara Brussels Kampala London Rome Rangoon Washington Bangkok Vienna

BEP 60 ADV – Persuasion 2: Establishing the Need

Welcome to the second in this three-part Business English Pod series on presenting your ideas presuasively. Last time we heard a bad example and a good example of persuasion. Then we covered the first step of the Monroe Sequence: We learned that to b

英语博客：Analysis Time - Detecting Explosives.

Technology being(1) developed at Pacific Northwest National Laboratory could put(2) explosive-sniffing(3) dogs out of business. Just like dogs, the technology can 'sniff' the air to detect vapors from explosives. Unlike dogs, it doesn't need to be fe

英语博客：Analysis Time - Social Activities Prolong Life.

In a study in The Harvard University Gazette called 'Social Activities Found to Prolong Life', scientists talk about the great importance of socializing as we get older. A healthy diet and regular exercise are the foundations of good health, but scie

英语博客：Analysis Time - A Chemical Ban.

Some state lawmakers are pushing to ban(1) potentially(2) cancer-causing(3) chemicals from children's products and sofas. The two flame retardant(4) chemicals are known as TCEP and TDCCP and are found in car seats, strollers(5), changing pads(6), oth

英语博客：Analysis time, - Quiet Books.

This following paragraph was taken from a home magazine that focuses on storage and using spaces well in the home. It might seem, in this age of electronic books and computer tablets, that a library is an outdated (1)room to include in a home. But, i

英语博客：Analysis Time - New Gun Laws

Facing powerful opposition to new gun laws, President Barack Obama is considering(1) 19 steps that he could take through executive action(2). The steps could include punishing(3) people who lie on gun sale background checks(4), getting more complete

英语博客：Analysis Time - Science For The Young

Nationwide(1), metal theft has become a serious problem since about 2005, according to(2) a 2010 report on metal theft by the U.S. Department of Justice. That's when metal prices rose substantially(3). In 2002, for example, copper prices hit a record

英语博客：Analysis Time - Wolf Debate.

Farmers, ranchers(1) and county officials(2) from Eastern Washington said a plan to manage(3) wolves as they are re-established in the state has good ideas but doesn't go far enough to cover their potential losses(4) or protect their property. Wolves

英语博客：Analysis time.

Some of my listeners have asked me to examine and explain English phrases and vocabulary in depth. I think that that is a great idea. In order to do this, I have selected a small paragraph from a magazine that is about wasting money. This will be the

英语博客：Analysis time, a Chinese revolt.

Today we will analyze part of a newspaper article in depth. Wukan, China - The Chinese fishing village that went into open revolt(1) against government control last year held elections on Saturday, an event that(2) some local people said was the firs

英语博客：Analysis time - community colleges.

Community colleges still don't get the dollars of their four-year counterparts(1), but they're standing very much in the spotlight(2) these days. President Barack Obama made them the focus last week when he unveiled(3) his proposed budget. Why all th

数学英语 26 What is the Golden Ratio

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

数学英语 18 What Are Geometric Sequences?

by Jason Marshall In the last article, we began talking about mathematical sequencesin particular, a type of sequence known as an arithmetic sequence. Today, were going to turn our attention to another type of sequence called a geometric sequence. In

如何应对过度思考

Are you guilty of dwelling on a problem much longer than you should? Many people get caught up in overthinking problems from time to time, but some people make a habit of it. This habit can affect grades and academic performance, because students can

美国国家公共电台 NPR How Data Analysis Is Driving Policing

AUDIE CORNISH, HOST: We live in an age of big data as our daily decisions are increasingly steered by computers. This week on All Tech Considered, we learn how the police are catching up with the rest of us. (SOUNDBITE OF ULRICH SCHNAUSS' NOTHING HAP

You and Your Boss

When you take a long time, you're slow. When your boss takes a long time, he's thorough. When you don't do it, you're lazy. When your boss doesn't do it, he's too busy. When you make a mistake, you're

XDF考研词汇串讲文本q

Argument写作必备词汇

因果（后接原因）： =〉因为：owing to; in respect that; on account of; due to; for the reason that; since; for; may account for; =〉由导致：as a consequence / result of; is the result of; derive from; result from; be a response to; 因