英语语法分析

It is not enough just to send more gunboats.

仅仅派出更多炮舰是不够的。

Fox said a few warships could be sent to prevent southern gunboats from interfering.

福克斯说，可以派遣少数军舰前往，以阻止南方炮艇的干扰。

The fort was surrounded by southern artillery. Southern gunboats guarded the harbor.

萨姆特堡四面被南方的炮火所包围，南方的炮艇守卫着这座港口。