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fall back on什么意思、怎么读?单词发音音标、相关例句、释义:求助于, 退到, 回头再说

fall back on 音标:[fɔ:l bæk ɔn]
求助于, 退到, 回头再说

We had to operate without a rear area to fall back on. You can imagine how difficult it was!

那时搞无后方作战,困难是可想而知的。

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