The instructional sequence requires six months to cover, and the time to finish has ranged from that up to a few years.
这一系列的课程需要六个月的时间来学习，至于顺利学成毕业，所需时间则从六个月到几年不等。
The instructional sequence requires six months to cover, and the time to finish has ranged from that up to a few years.
这一系列的课程需要六个月的时间来学习，至于顺利学成毕业，所需时间则从六个月到几年不等。
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