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这家航空公司经营五条主干线和二十条支线。
This air line operates five main lines and twenty branch lines.
youdao
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这家航空公司经营五条主干线和十几条支线。
This airline operates five main lines and dozens of branch lines.
youdao
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这家航空公司经营五条主干线和十几条支线。
This airline operates five main lines and dozens of branch lines.
youdao