Enemy Situation Correlation Element的用法和样例：
例句
- Beacon towers are situated at suitable intervals to give the alarm if an enemy approached.
遇有敌情，士兵会在长城北侧沿线的烽火台上点燃烟火，将情报传递到附近的城市直至皇帝的都城。 - But in the War of Resistance Against Japan, with a different enemy and in different circumstances, there was a shift back to guerrilla warfare.
但在抗日战争期间，根据敌情的变化，这种带游击性的运动战又基本上转变为游击战争。
