两国之间的战争已经持续了十年。

The ___war between the two countries has lasted for ten years.

这座城市发动了一场对抗污染的战争。

The city launched a ___war against pollution.

这两支球队之间的竞争已经升级成了全面对抗。

The rivalry between these two teams has turned into a full-blown ___war.