main operation direction的用法和樣例：
例句
- I am not objecting to operations in two or more directions,but at any given time there ought to be only one main direction.
我不反對作戰方向有兩個或兩個以上，但主要的方向，在同一個時間內，只應有一個。 - The Red Army's battle lines are determined by the direction in which it is operating.
紅軍的作戰線，服從於紅軍的作戰方向。
