To forget the means once the end is achieved; to discard the tool after the goal is met.
他在创业初期得到了很多人的帮助，但成功后却很少再提及他们，这让一些老朋友觉得他有点得兔忘蹄。
He received much help during the initial stages of his entrepreneurship, but after succeeding, he rarely mentioned those who helped him, which made some old friends feel he was a bit like getting the rabbit and forgetting the snare.
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