在考研面试中，如果需要道歉，以下是一些简洁而诚恳的道歉语句，你可以根据实际情况进行选择和调整：
1. "I sincerely apologize for any inconvenience I may have caused."
2. "Please accept my deepest apologies for my tardiness."
3. "I regret to inform you that I was not able to prepare the material as thoroughly as I had hoped."
4. "I am sorry for any mistakes I made during the presentation."
5. "I am truly sorry for not meeting the deadline. I understand this may have affected your expectations."
记得在道歉的同时，提供合理的解释，并表达出你改正错误的决心和愿意采取的措施。希望这些建议对你有所帮助，