1912年，孙中山曾说：“今日满清退位，中华民国成立，民族、民权两主义俱达到，惟
问题：
1912年，孙中山曾说：“今日满清退位，中华民国成立，民族、民权两主义俱达到，惟有民生主义尚未着手，今后虽人所当致力的即在此事。”你是否同意他的说法？结合相关史实加以说明。
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