这些远程学习程序锁步，队列的程序，这需要大约2和1 / 2年时间才能完成。
These distance learning programs are lock-step , cohort programs, that require approximately 2 and 1/2 years to complete.
这些远程学习程序锁步，队列的程序，这需要大约2和1 / 2年时间才能完成。
These distance learning programs are lock-step , cohort programs, that require approximately 2 and 1/2 years to complete.
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