名词
中文翻译：射击线
同义词：
['line of fire', 'front line']
例句：
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1. The soldiers were ordered to move forward and form a firing line.
士兵们被命令向前移动，形成一个射击线。
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2. The warship was positioned at the firing line, ready to launch its missiles.
战船被部署在射击线上，准备发射导弹。
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3. The soldier stood at the firing line, ready to take on the enemy.
士兵站在射击线上，准备对抗敌人。