How to apologize for your late reply?

Apologize directly, explain the reasons, etc.

1. If you are late for the defense, you should apologize to the defense committee or relevant personnel as soon as possible. You can simply say "I'm sorry" or "I'm sorry" first to show that you realize that you shouldn't be late.

You can explain the reason for being late, but you should pay attention to avoid involving some unnecessary details. When you are late because of the traffic jam, you can say "I'm sorry, I'm late because of the traffic jam" instead of describing the traffic jam in detail.