小组讨论临时缺席时，最好提前在群里说明原因，并主动问“我会后补哪一块？
If you must miss a group discussion on short notice, it's best to explain the reason in the group chat beforehand and proactively ask, 'Which part should I catch up on afterwards?'
If you must miss a group discussion on short notice, it's best to explain the reason in the group chat beforehand and proactively ask, 'Which part should I catch up on afterwards?'