branch off
phrasal verb with branch verb [ I ] uk/brɑːntʃ/ us/bræntʃ/
（道路）岔开，分岔
If a road or path branches off, it goes in another direction.
We drove down a narrow track that branched off from the main road. 我们行驶在一条从主干道上分岔出来的窄路上。
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