名词
中文翻译：投石器
同义词：
['throwing stone', 'throwstone']
例句：
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1.The ancient city has a pitch stone tower that dates back to the 13th century.
这个古老的城市有一个可以追溯到13世纪的投石塔。
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2.The engineer used a pitch stone to level the ground before building the new bridge.
工程师使用投石器平整地面，以便建造新桥。
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3. The soldiers were ordered to use their pitch stones to clear the path for the marching army.
士兵们被命令使用投石器为行军的军队开辟道路。