雅思写作需要每段都有明确的中心吗？

国内英语资讯:Chinese official voices stronger links with Lithuania

体坛英语资讯：Robben ends debate over himself and Messi

体坛英语资讯：New testing framework within WADA proposed at Olympic Summit

体坛英语资讯：Jailed Marseille fan set to be released on bail

体坛英语资讯：Ramos kicks off Madrid reign with easy win

体坛英语资讯：Cameroon draws Algeria 1-1 in World Cup qualifier

国内英语资讯:Support from China crucial, says Colombian ambassador

体坛英语资讯：Yin named as caretaker coach of Chinese national team

体坛英语资讯：Man. United beat Chelsea 3-0 in Premier League

体坛英语资讯：Schalke 04, Leverkusen rebound upward trend

国内英语资讯:Thailand willing to work with China to start railway project soon: Thai PM

体坛英语资讯：Mane named new Espanyol coach

体坛英语资讯：Huntelaar: Im at the best club in the world

欧盟要完？意大利公投，美国欧洲一片哗然

国内英语资讯:Iran, China vow to further enhance cooperation

美国制裁朝鲜 中国公司遭无妄之灾

体坛英语资讯：Brazilian player Hernanes receives worldwide attention

体坛英语资讯：Heinze adds to Real Madrids injury worries

国内英语资讯:China, Portugal pledge to upgrade economic cooperation

体坛英语资讯：Safina marches on in Sydney

交通信号灯为何用红色、黄色和绿色？

体坛英语资讯：Curl it like Kobe: Bryant ends Yao s 3-game win streak

体坛英语资讯：Federer surprised by favorite tag for Murray

国内英语资讯:Xi stresses Internet innovation, security

体坛英语资讯：Higgins beats Ding to reach semis at snooker Masters

体坛英语资讯：Marbury suspended for one game by Knicks

国际英语资讯:Trump needs to pivot to jobs, economy in debate amid scandal over lewd sexist remarks: Trump

体坛英语资讯：Barcelona display authority as Real Madrid lose their way

体坛英语资讯：Ronaldo takes 1st award, Marta makes it three in a row

体坛英语资讯：Aguirre: We want to finish top of our group