名词中文翻译
中文翻译：预习部分
同义词：
['preparatory part', 'preliminary part']
例句：
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1.The teacher explained the concept of calculus in his presulcal part.
老师在他的预习部分解释了微积分的概念。
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2.In the presulcal part of the lesson, the students were asked to solve problems on their own.
在课的预习部分，学生们被要求独立解决问题。
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3. The presulcal part of the textbook is designed to help students prepare for the main content.
教科书的预习部分旨在帮助学生为主要内容做准备。