名词
中文翻译：信用小时
同义词：
['credit period', 'credit hours例句：1. She has been working on her computer science course for three credit hours.（她一直在学习计算机科学课程，已经上了三个小时。）']
例句：
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1. She has been working on her computer science course for three credit hours.
她一直在学习计算机科学课程，已经上了三个小时。
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2. The university offers a variety of courses with different credit hours.
大学提供各种课程，有不同的学分小时数。
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3.The student needs to complete at least 15 credit hours to graduate.
学生至少需要完成15个学分才能毕业。