6th AD Columbia MSCS

今天早上收到的结果，另外求比较跟Cornell Tech CS。

这个项目可以defer吗，官网上的消息写的是：
There is no option to defer admission offers. However, candidates who have applied and were admitted to a Columbia Engineering graduate program, but did not attend, may reactivate their applications for one of the two terms following their original application. Candidates who do not request reactivation within the year are required to submit a new application.  Please be aware that candidates who reactivate their applications are essentially reapplying for admission. Applicants who were not previously admitted cannot use the reactivation application process to apply again.   

For students admitted for the Fall 2020 semester only: if you are not able to enroll for the term you were admitted because of inability to enter the United States (e.g. travel restrictions due to COVID-19), you will be allowed to enroll in the subsequent semester or subsequent academic year.  We do not consider this delayed enrollment as a deferral of admission.   
不太懂他的意思。。enroll in next semester跟defer有啥区别呢，谢谢各位！