复数： thalassocracies

In the 18th century , in order to enable the northern european navy to gain the thalassocracy and trading passage which could bring great profits , a group of large wooden ships with strong firepower called warships was made .

至18世纪时，为了使从事海战的北欧海军能掌握制海权及利润丰厚的贸易通道，建造了一批火力强大的被称为战舰的大型木船。