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air corridor

noun
🔊/ˈeə kɒrɪdɔː(r)/
🔊/ˈer kɔːrɪdɔːr/
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  1. an area in the sky that aircraft must stay inside when they fly over a country（飞机飞越外国领空时获准使用的）空中走廊Topics Transport by airc2