write an English email to TC68 秘书邮件要包括主题邮件内容是告知秘书：由于行程原因部分中国专家无法去悉尼 现场参加年会会远程参会语气平常 不要啰嗦

Subject: Remote Participation of Chinese Experts in the TC68 Annual Meeting

Dear TC68 Secretary,

I am writing to inform you that due to some unexpected changes in their schedules, some of the Chinese experts will not be able to attend the annual meeting in Sydney in person. However, they will participate in the meeting remotely.

We apologize for any inconvenience this may cause and hope that the remote participation will still allow for productive discussions and outcomes.

Thank you for your understanding and cooperation.

Best regards,

[Your Name