名词
中文翻译：Unknown
同义词：
['head', 'manager', 'chief例句：1. The principal is giving a speech at the school assembly.（校长在学校集会上发表演讲。）2. The principal wants to improve the quality of education in the school.（校长想提高学校教育的质量。）']
例句：
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1. The principal is giving a speech at the school assembly.
校长在学校集会上发表演讲。
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2. The principal wants to improve the quality of education in the school.
校长想提高学校教育的质量。
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3. The principal has just announced the new curriculum for next semester.
校长刚刚宣布了下学期的新课程。