guò / qù / xǔ / duō / shāng / chuán / wǎng / lái / yú / wài / yáng / hé / yán / hǎi / gǎng / kǒu / zhī / jiān

过去，许多商船往来于外洋和沿海港口之间。

In the past, many merchant ships traveled between the open seas and coastal ports.