be at war

• vt. 处于交战状态(不和；进行竞争)

be at war的用法和样例：

例句

1. The country has been at war with its neighbour for two years.
   这个国家与邻国已打了两年仗了。
2. During the Second World War, Germany was at war with almost all the countries in the world.
   第二次世界大战期间，德国几乎同世界上所有的国家处于交战状态。