1.兴趣（不可数）He has a particular interest in Italian art.
2.引起注意的（不可数）places of interest：The city has a multitude of museums and places of interest.
3.爱好（可数）Tell us about your interests and hobbies.
4.利息（不可数）You will repay the money with interest, as agreed in the contract.
5.利益（可数）All he cares about is protecting his own interests.
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