1. Excuse me. I am not available now. I will chat with you when I am free. 对不起，我现在很忙，有时间再和你聊. 2. Sorry. I am chatting with my friend. I will chat with you when I am free. 抱歉，我的朋友在和我聊，有空了我再去找你 3. Sorry. I sent wrong message to you. Let's forgive and forget it. 对不起，我发错了信息。别介意。 4. I apologize about I am so low. You know my English is poor. 抱歉，我的速度比较慢，因为我的英语很差。 5. Will you excuse me for a while? It is about 5 minutes. 对不起，我要暂时离开一下，大约是5分钟时间。