名词
中文翻译：门槛
同义词：
['threshold', 'boundary', 'threshold course']
例句：
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1.The lintel course is the first step in building a new house.
门槛是建造新房子的第一步。
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2. The threshold course is designed to help students prepare for college entrance exams.
门槛课程旨在帮助学生为大学入学考试做准备。
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3. The boundary course is a specialized program that focuses on environmental science and sustainability.
边界课程是一个专注于环境科学和可持续性的专项课程。