MEANING/意义
以
备
EXAMPLES/列句
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还是多准备一些钱吧,以备不时之需。You'd better prepare more money just for emergency needs.
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我喜欢在手头上留存一些信封,以备不时之需。I like to keep a few envelops about in case that I need them.
COMBINATIONS/组合
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以备不虞in case something unexpected happens