例句與造句

1. Only when a great deal more information has been obtained, will it be possible to plan a manned trip to mars .
   只有在獲得大量資料后，才有可能籌劃載人的火星之行。
2. Fuel - cell cars , in contrast , are expected on about the same schedule as nasa ' s manned trip to mars and have about the same level of likelihood
   相對(duì)之下，燃料電池車(chē)的進(jìn)度，預(yù)料還跟美國(guó)航太總署（ nasa ）的載人上火星之旅相去不遠(yuǎn)，實(shí)現(xiàn)的可能性還高不了多少。
3. It's difficult to find man trip in a sentence. 用man trip造句挺難的