名词
中文翻译：头骨练习
同义词：
['cranial practice', 'skull training']
例句：
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1. He is practicing his swordsmanship with a wooden head.
他正在用木制头练习剑术。
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2. The doctor advised her to do some skull practice to relieve her headache.
医生建议她做一些颅骨练习来缓解头痛。
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3. During the war, soldiers often had to perform skull practice to survive.
在战争中，士兵们经常不得不进行颅骨练习以生存。