scratch the surface

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释义
浅尝辄止；蜻蜓点水；敷衍了事
To do, engage with, or understand something to only a minimal or superficial degree.

例句
Frank:The man never scratched the surface of life.Maybe it's best he died so young.（House of Cards）
弗兰克：他根本从未真正地活过，也许他早逝是件好事。（纸牌屋）