a long shot

漢語翻譯

例句：

1. Looking for her in the library was a long shot; I had no idea where she was.
   在圖書館中想找到她是不大可能成功的嘗試，我不知道她在哪兒。
2. John was a long shot for mayor.
   約翰競選市長，當選希望很小。
3. It's a long shot, but I should say she's about forty.
   這不好猜，但我猜她大約是四十歲左右。
4. It's a long shot but I think John must have stolen the bike.
   這只是一種猜測，但我認為一定是約翰偷了腳踏車。