Learner's definition of YOURS
1
: that which belongs to you : your one : your ones（属于）你的，您的，你们的 -
This book is yours. [=this book belongs to you; it is your book]这本书是你的。
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Yours is the book on the left. [=your book is the one on the left]你的书是左边的那本。
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My car is old, but yours is older.我的车旧，但你的更旧。
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The responsibility for keeping the apartment clean is yours.保持公寓整洁是你的责任。
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All those CDs of yours take up an awful lot of space.所有你的那些CD占据了太大的空间。
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Is that guy a friend of yours? [=your friend]那个人是你的朋友吗？
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My wife is a big fan of yours.我的妻子是您的忠实粉丝。
2
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used at the end of an informal letter你的…（用于非正式信件末尾） 3
old-fashioned : your letter你（们）的来信
yours ever
or ever yours — see ever
yours sincerely
or sincerely yours — see sincerely