形容词
中文翻译：预备的
同义词：
['preparatory', 'preliminary', 'preliminary', 'preliminary']
例句：
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1. The teacher gave a preparatory lecture before the exam.
老师在考试前做了一次预备演讲。
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2. The students are preparing for their final exams.
学生们正在为期末考试做准备。
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3. The preparatory work for the project has been completed.
项目的准备工作已经完成。