•She eats an unbelievable amount of food.她的食量惊人。

•You've had such bad luck it's unbelievable.你的运气这么差，真是令人难以置信。

•You should see her wardrobe - it's unbelievable - she's got about fifty pairs of shoes.你该看看她的衣柜——真是不可思议——她有大约50双鞋。

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•I found most of the characters in the play totally unbelievable.我发现该剧中的大多数角色都完全不可信。