"Registration method" is the way to enroll or sign up for something, such as an event or a course. This phrase comes from the verb "to register", which means to sign up or enroll for something.
Here are some examples of how "registration method" can be used in sentences:
"Please let me know the registration method for the conference." (请告诉我参加会议的报名方式。)
"What is the registration method for the onpne course?" (在线课程的报名方式是什么？)
"The registration method for the marathon is through the event's website." (马拉松比赛的报名方式是通过比赛网站。)