To substitute one thing for another, often implying an unfair or deceptive exchange; to take the blame for someone else.
他为了保护朋友，竟然主动桃僵李代，替朋友承担了责任。
To protect his friend, he actually volunteered to take the blame in his friend's stead.
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To substitute one thing for another, often implying an unfair or deceptive exchange; to take the blame for someone else.