It is daily practice that eventually makes perfect, not last-minute cramming.

It 虚主语，is be 动词，daily 形容词 + practice 名词分别括号，共同构成被强调的抽象名词短语，that 引导从句。It-cleft 突出'日常练习'是实现完美的关键因素，eventually 暗示长期效应。