名词
中文翻译：方阵的中轴线
同义词：
['spear shaft', 'spearshaft of a phalanx', 'spear shaft of a phalanx', 'spear shaft of the phalanx']
例句：
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1. The soldierslined up in a neat row, witheach soldier's spear shaft pointing towardsthe center.
士兵们整齐地排成一行，每个士兵的矛杆都指向中心。
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2. The spear shaft was made of woodand could be easily broken if hit byan enemy.
矛杆是用木头做的，如果被敌人击中很容易折断。
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3. The spearshaft was used to strike at the enemyfrom behind, causing them to fall tothe ground.
矛杆用于从后方攻击敌人，使他们倒地。