Typically, the number of active service classperiods in a system should not exceed 30.
通常，系统中的活动服务分类周期的数量不应该超过30。
2
He told us that one way of getting acquainted with each other in a new school was by a series of short speeches in classperiods during the first week or two in school.
This class meets twice a week and is designed to supplement the regular ESL/English class that meets five times a week. All students now have seven classperiods of ESL/English each week.