But air freight is unlikely to be a large substitute for large shipping by corporations, when such routine replenishment orders planned ahead of time are usually more efficiently transported through seaborne trade.

但是， 空运不太可能替代企业的大型海运，因为提前计划的例行补货订单通常通过海运贸易更有效地运输。

The island of Sri Lanka, separated from India by only 20 miles (32 km) of shallow water, has always been an important hub in the seaborne trade that stitches the lands of the Indian Ocean together.

斯里兰卡岛与印度仅隔着二十英里浅海，一直是海上贸易的重要集散地和印度洋各岛的连接点。