fall back on片語動詞

依靠、求助於、依賴

If the business fails, she can always fall back on teaching.

如果生意失敗，她還可以靠教書維生。

退回到、重拾

Under pressure, he fell back on the same tired excuses.

壓力一大，他又退回到那些老掉牙的藉口。

備用方案、退路、後備選擇

We need a fallback in case the funding never arrives.

萬一資金遲遲不到，我們需要一個備用方案。

備用的、後備的

The system switches to a fallback server during maintenance.

維護期間系統會切換到備用伺服器。