Astronomers have discovered a distant galaxy.天文学家们发现了一个遥远的星系。The Galaxy consists of 100 billion stars.银河系由1,000亿颗恒星组成。The spaceman flew through the galaxy at the speed of light.太空人以光速穿越银河系.We report Chandra observations ...
This book has a foreword by the President.这本书有一篇总统作的序言.She has written the foreword to a book of recipes.她为一本食谱写了前言。That dictionary has a preface, not a foreword.那部词典有一篇序文, 不是前言....