Gross National HappinessIn the last century, new technology improved the lives of many people in many countries. However, one country resisted these c...
Can Buildings Be Designed to Resist Terrorist Attack?In the aftermath of the terrorist attack on the World Trade Center, structural engineers are try...
be able to(do)能(做)，会(做)be absent from缺勤，缺课be accustomed to习惯于be active in积极于be alive to发觉，感觉，对…敏感be angry with对……发怒be anxious for急切盼望，渴望be about to(do...
Better Control of TB Seen If a Faster Cure Is FoundThe World Health Organization1 estimates that about one-third of all people are infected with bacte...
Studies Show US Spending Doesn’t Get Best HealthThe United States many spend twice as much on health care as other rich countries1, but it is not gett...
名词或代词作主语时和谓语之间的单复数的一致问题：1.谓语和谓语基本保持单复数的一致,即：主语是可数名词单数或不可数名词时,谓语动词用单数形式：如：The computer was a great invention.(计算机是个了不起的发明)The water in the glass is ver...
go before居前have to/have got t0不得不，必须help oneself自取所需(食物)keep out of躲开，置身…之外get out of逃避，改掉have get有give oneself up自首，投降，投案go along with陪同前往，随行g0 in fo...
名词：(一)英语名词可分专有名词和普通名词两大类：1.专有名词是个别的人、地、物、团体、机构等的专用名称。专有名词中实词的第一个字母要大写。如：Beijing, Tom, the People’s Republic of China(中华人民共和国)专有名词如果是含有普通名词的短语,则必须使用定冠词...
Operation MigrationIf you look up at the sky in the early fall in the northern part of North America, you may see groups of birds. These birds are fly...
代词(一)代词的分类：英语中代词分为：人称代词、物主代词、反身代词、指示代词、关系代词、疑问代词、连接代词和不定代词等等。(二)人称代词：人称代词代替人和事物的名称,分为主格和宾格两种形式。1.主格用来作句子的主语、表语。如： I often go shopping on Sundays.(星期天我...
Most Adults in US Have Low Risk of Heart DiseaseMore than 80 percent of US adults have a less than 10–percent risk of developing heart disease in the ...
答案在下一页One Good Reason to Let Smallpox LiveIt's now a fair bet that we will never see the total extinction of the smallpox virus.The idea was to cap t...
once upon a time从前no wonder难怪，怪不得decline with thanks婉言谢绝account for说明(原因等)allow for考虑到arrive at达成，得出ask for请求，要求begin with从开始break off断绝，结束break up中止，...
Are You Just Not Ill or Excellent in Health?As we have seen, the focus of medical care in our society has been shifting from curing disease to prevent...
Investment and ConsumptionInvestment in the public sector,such as electricity,irrigation,public services and transport (excluding vehicles,ships and p...
Physical FitnessPhysical fitness is today’s hot topic. And wherever you turn, you hear something new. But is it all true?The more you sweat, the more ...
Lead PollutionLead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions ori...