汉语翻译：
【计】 通信业务拥挤, 通信业务繁忙例句：

He was late owing to/due to the very heavy traffic.他迟到是因为交通拥挤。

His lateness was due to the very heavy traffic on the motorway.他迟到是因高速公路上车辆过多所致。

Heavy traffic poses a problem in many old towns.交通拥挤是许多旧城镇的难题。

What heavy traffic!多拥挤的交通！

The heavy traffic crawled through the narrow tunnel.拥挤的车辆慢吞吞地穿过狭窄的隧道。

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