名词
中文翻译：Unknown
同义词：
['ossification', 'skull']
例句：
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1. The scientist discovered the first human skull in Africa.
这位科学家在非洲发现了第一个人类头骨。
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2. The skull was covered with a layer of dust and dirt.
这个头骨被一层灰尘和泥土覆盖着。
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3. The skull is an important part of the human body.
头骨是人类身体的重要组成部分。