fall back on

柯林斯词典

fall back on (falling,fell,fallen,falls)

• 1. PHRASAL VERB If you fall back on something, you do it or use it after other things have failed. 轉而使用

  When necessary, instinct is the most reliable resource you can fall back on. 必要時，本能是你可使用的最可靠的資源。

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