“投石机”造句

投石机: 古代投掷物体之发射器,用作发射长箭或重型球状物.
Ballista: Ancient missile launcher designed to hurl long arrows or heavy Balls.

最大之投石机可相当准确地发射27公斤重物到约450 公尺 处的目标.
The largest could accurately hurl 60 - lb ( 27 - kg ) weights up to about 500 yards ( 450 m ) .

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