unbelievable
[ˌʌnbɪˈlivəbəl]
adj.
不可相信的;
站不住脚的;
（由于太好或太糟而）令人难以置信的;
非常惊人的;
例句:
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I still find this story both fascinating and unbelievable.
我仍觉得这个故事既有趣又不太可信。
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There's still an unbelievable amount to play for.
来自BBC
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It was an unbelievable moment when Chris won the gold medal.
克里斯赢得金牌的那一刻令人不可思议。
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"Three golds is unbelievable," said Ennis.
来自BBC
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He's a swashbuckler. He has such unbelievable charisma and energy.
他是一个传奇人物，他的个人魅力和充沛精力让人难以置信。
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"It was unbelievable," Stringer said yesterday.
来自THETIMES