diamond in the rough

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌdiamond in the ˈrough noun [countable]  KIND American English someone who behaves in a slightly rude way, but is really kind and generous 外粗内秀的人 SYN British English rough diamond

ˌdiamond in the ˈrough nounChineseSyllable  

diamond in the rough
ˌdiamond in the ˈrough noun [countable]
American English someone who behaves in a slightly rude way, but is really kind and generous
   SYN  rough diamond British English

diamond in the roughBrE /ˌdaɪəmənd ɪn ðə ˈrʌf/ 🔊NAmE /ˌdaɪəmənd ɪn ðə ˈrʌf/ 🔊 (NAmE) (BrE ˌrough ˈdiamond) nouna person who has many good qualities even though they do not seem to be very polite, educated, etc. 外粗内秀的人