There are various wars over control of the seas.

英荷曾爆发过几次争夺海上霸权的战争。

Some lawmakers expressed concern that what China is building could be used to enforce control of the sea.

一些立法者表示担心中国正在建造的东西可能会被用来加强对海洋的控制。

The British made good use of their fleet in cutting off American trade, but control of the sea did not seriously affect the United States.

——英国人很好地利用了他们的舰队来切断美国的贸易，但是对海洋的控制并没有严重影响到美国。