国外大学的add/drop period是什么意思?

“加退选期”
就是开学初选课（add）以及不想选了又改掉（drop）的那段时期（period）（一般都是第一周）
例子：
No refund is allowed after the add/ drop period (the first 5 days of a school term).Handling fee on top of the tuition fee will be charged if dropping a course during the first week of school.
加退选期后（每学期首五日后）退科或退学恕不退款,开学后首周退科或退学,除了学费外,另徵收手续费.

就是加课退课的意思：
Add/Drop enrollment for the spring semester has begun. Please see the Registrar, Mrs. Shu-Chin Chung, for forms.
中文学校下学期的注册及加退选已开始。需要办理的家长请洽注册组长钟淑钦女士。

选课的日子