名词
中文翻译：Unknown
同义词：
['main', 'chief', 'principal例句：1. The principal of the school is a very experienced teacher.（学校的校长是一位非常有经验的老师。）2. He was the principal of the school for many years.（他在学校担任校长多年。）']
例句：
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1. The principal of the school is a very experienced teacher.
学校的校长是一位非常有经验的老师。
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2. He was the principal of the school for many years.
他在学校担任校长多年。
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3.The principal announced that there would be no more classes today.
校长宣布今天不再上课。