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While the kinds of instruction offered in these programs will differ, distance learning usually signifies a course in which the instructors post syllabi , reading assignments, and schedules on Websites, and students send in their assignments by e-mail. 分析主干：distance learning signifies a course 1.句首While 引导状语从句，有让步、对比之意。 2.in which 引导定语从句修饰a course，该从句本身是and 连接两个分句构成的并列结构，两个分句分别讲到有关老师和学生的情况。post... on Websites 结构中，post 含有3 个宾语。 译文：虽然网络课程提供的教学形式会各不相同，但远程学习通常都表现为这样一种课程：教师将课程大纲、阅读作业及课程进度安排在网站上公布，学生通过电子邮件提交作业。 | 
