And there were considerable developments of seamanship and shipbuilding in progress. 赫伯特·乔治·威尔斯.世界史纲.
In that sea, therefore, oars became the characteristic instruments of navigation, and the arrangement of oars the chief problem in shipbuilding. 赫伯特·乔治·威尔斯.世界史纲.
The nobles and commoners became landlords and gentlemen farmers; it was they who directed the shipbuilding and engaged in trade. 赫伯特·乔治·威尔斯.世界史纲.