名词
中文翻译：Unknown
同义词：
['throwing motion', 'catapult motion']
例句：
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1. The sling was used to throw stones at the enemy.
投石机用来向敌人投掷石头。
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2. The sling was a useful tool for hunters in ancient times.
投石机是古代猎人的一种有用的工具。
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3. The sling was used as a weapon during the battle.
在战斗中，投石机被用作武器。