Mr Wang had taught in our school for six years before I came here.
在我来到这儿以前，王老师已经在我们学校任教6年了。
Professor Wang had not given a talk on management for a long time.
王教授很久没有讲授管理方面的课程了。
Professor Wang had not given a talk on management for a long time.
王教授很久没有讲授管理 方面的课程了。
Professor Wang had not given a talk on management for a long time.
王教授很久没有讲授管理 方面的课程了。
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