commencement
n. 开始，开端；<美>毕业典礼
复数 commencements
例句
All applicants should be at least 16 years of age at the commencement of this course.
所有申请人在本课程开始时应至少年满16岁。
《柯林斯英汉双解大词典》
The protracted nature of the commencement speech did not sit well with the restless group of recent graduates.
毕业典礼演讲的时间太长，让这群焦躁不安的应届毕业生很不舒服。
President Bush gave the commencement address today at the University of Notre Dame.
布什总统今天在巴黎圣母院大学发表了毕业典礼演说。
