To supplement high school AP-prep classes, the Web site compiles material relevant to all three subjects, including video clips, exam questions, and practice problems.
作为对原有内容的补充，课程计划网站编辑整理了诸如视频剪辑、考试真题和练习题等与这三科相关的内容。
To supplement high school AP-prep classes, the Web site compiles material relevant to all three subjects, including video clips, exam questions, and practice problems.
作为对原有内容的补充，课程计划网站编辑整理了诸如视频剪辑、考试真题和练习题等与这三科相关的内容。
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