求助於;藉助於;轉而依靠
fall back on sb / sth
to go to sb for support; to have sth to use when you are in difficulty
I have a little money in the bank to fall back on.我在銀行還有一點錢,需要時可以動用。
釋義來自《牛津高階英漢雙解詞典》第 9 版