所有进出港口的船只都应当使用主航道。

All craft entering and leaving the harbour should use the main buoyed fairway.

同时这里也是石油运输的主航道，是全球商业的命门所在。

Here lie, he says, are the principle oil shipping lanes and "choke points of world commerce."

概述上海国际航运中心洋山深水港区主航道的水文泥沙条件。

This paper summarizes the hydrological conditions and sedimentation status of the main navigation channel of the Yangshan Deepwater Port.

在主航道交通繁忙的条件下进行水下爆破以炸除拦门礁。

An underwater blasting to explode the submerged reefs was performed in the condition of heavy traffic on the main channel.