1. The Etorofu is a type of patrol ship used by the Japan Maritime Self-Defense Force.
Etorofu是日本海上自卫队使用的一种巡逻船。
2. In the game, players can use the etorofu to strategically defend their territory.
在游戏中，玩家可以利用etorofu来战略性地保卫自己的领土。