动词短语
中文翻译：向空中射击
同义词：
['fire at', 'fire upon', 'launch artillery']
例句：
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1. The soldiers were ordered to fire at the enemy from a high position.
士兵们被命令从高处向敌人开火。
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2. The warship launched its main gun to fire upon the enemy ships in the harbor.
这艘战舰发射主炮，向港口中的敌舰开火。
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3. The pilot fired upon the enemy planes with his cannon.
飞行员用他的大炮向敌机开火。