commencementn.开始;毕业典礼
commencement of works工程开工
commencement ceremony(美国)毕业典礼
commencement exercises学位授予典礼
commencement of action起诉
commencement of setting凝结开始
commencement of statute法规开始实施
commencement of tenancy租赁开始生效;租约开始生效
Commencement of Rifling膛线起端
commencement of business开始营业
commencement of injection供油始点