Early astronomers thought that our planet was the centre of the universe.早期的天文学家认为我们的星球是宇宙的中心。Space scientists and astronomers have taken another step forwards.航天科学家和天文学家又取得了进展。Astronomers used to ask why only Saturn has...
Yellow Labradors are often mistakenly called golden Labradors.人们经常把黄拉拉误称为金拉拉.I was mistakenly assumed to be a Welshman because of my surname.由于我的姓的缘故,我被误认为是威尔士人。Last year, diethylene glycol was mistakenly mixed with coug...