名词
中文翻译：红线
同义词：
['border', 'line', 'boundary例句：1. The soldiers stood at the red line', 'ready to defend their country.（士兵们站在红线上，准备保卫他们的国家。）2. The police were ordered to maintain a safe distance from the red line.（警方被命令与红线保持安全距离。）']
例句：
-
1. The soldiers stood at the red line, ready to defend their country.
士兵们站在红线上，准备保卫他们的国家。
-
2. The police were ordered to maintain a safe distance from the red line.
警方被命令与红线保持安全距离。
-
3.The army had to cross the red line to reach the enemy's position.
军队不得不穿过红线到达敌人的阵地。