火星的樣子: pink sky, orange sunset, vast desert, massivecanyon, red planet 與氣候有關的詞: climate,blazing hot, freezing cold 常見化學物質: iron,carbon dioxide,nitrogen,oxygen物質的三態:solid,fluid,gas as a result 結果 remind sb.of sth.提醒某人某事 paya visit進行訪問 upside down 倒置地;顛倒的 be used to doing sth.習慣于做某事 be home to...是.....的所在地 現在完成進行時的用法，例如: For the past 50 years,scientistshave been doing just that...except that spacecraft, not humans.have been making the trip. 并列結構作主語時主謂一致，例如: Mars,along with Mercury,hasthe lowest surface gravity in the solar system. if引導的條件狀語從句，例如: ifthat's true,then realMartians arejust like creatures that are all around us here on Earth.