你可以费尽口舌，但改变不了我的主意。
You can argue till you're blue in the face, but you won't change my mind.
我本打算投他的票，但后来改变了主意投了里根的票。
I was going to vote for him, but I changed my mind and voted for Reagan.
我一开始不愿意申请成为交换生，但后来我改变了主意。
I was reluctant to apply to be an exchanged student at the beginning, but then I changed my mind.
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