Long是长的意思，说一件事情是long shot，意思就是成功的可能性很小，不过还是值得尝试。A long shot这个习惯用语是从十九世纪末开始流行的。最早起源于打枪。枪支刚刚出现时，准性很差，距离稍微远一点就打不中目标。因此，a long shot就成了成功可能性很小的意思。
Sure, it's a long shot, but why not? You thought you weren't going to get your current job! You said they'd never hire you straight out of college. But you got that job and who knows, maybe you'll get this one too.
没错，申请到这个工作的机会确实不大，但为什么不去试试看呢？你原来也没想到能争取到现在这份工作啊！还说什么他们死活不会招个象你这样大学刚毕业的新人，结果他们还是雇了你啊。谁知道呢，没准这次你又能拿到呢。
In this year's Kentucky Derby, Brother Derek is a safe bet but if he wins you'll only win a small amount. However, if you want to take a long shot, put your money on Giacomo. He doesn't have the best record, but if he wins you'll win a lot of money!"
这段话说：今年的肯塔基赛马大会，把赌注押在德拉克弟兄身上很保险，但是如果它赢了，你只能赢一点点钱。不过，如果你决定选择一匹胜算不大的马，那就把钱押在Giacomo身上吧，它的比赛记录虽然不是最好的，但如果它赢了，你就能赢很多钱。
(欢迎在文末下方留言a long shot打卡，加强记忆)
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内容来自VOA - Words And Idioms。
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