rough diamond

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相關對話：

1. Mrs.White seems to have a devil of a temper, but she is a rough diamond.
   懷特太太看來脾氣很壞，但她是個心地很好的人。
2. I know he looks a bit of a rough diamond in his tattered jeans, but apparently he does a lot of good work for local charities.
   我知道他穿著破爛的牛仔褲看上去有些渾金璞玉的樣子，但清楚他是為當地的慈善事業做了許多有益的工作。