发送留学补考邮件时，可以遵循以下步骤和注意事项：

确定收件人

确认需要发送补考通知的导师或学校部门的电子邮件地址。

邮件主题

使用简洁明了的主题，例如“Request for Resit Exam”或“Resit Exam Schedule for [Course Name]”。

邮件正文

开头：礼貌地称呼收件人，并简要说明写信的目的，例如“Dear Professor [Last Name], I am writing to request a resit opportunity for the course [Course Name]”。

中间：

回顾考试表现：简要说明在考试中遇到的困难或意外情况，如健康问题、家庭紧急事务等。

请求补考：明确表示希望获得补考的机会，并解释为什么需要这次机会。

结尾：

感谢：表达对收件人关注和配合的感谢，例如“Thank you for your attention and cooperation”。

期待回复：请求收件人回复确认，并表示期待他们的回复。

其他注意事项

格式：确保邮件按照正确的格式进行，包括问候语、自我介绍（包括你的姓名和学生编号）以及明确的请求补考的原因和希望补考的日期等。

原因和证据：在邮件中，你需要解释为什么你错过了考试或未能通过考试，并提供具体的细节和相关证明，例如医生的证明信、家庭成员的状况等。

联系方式：在邮件中提供你的联系方式，以方便对方与你进一步沟通。

```

Subject: Request for Resit Exam for [Course Name]

Dear Professor [Last Name],

I hope this email finds you well. I am writing to request a resit opportunity for the course [Course Name].

During the recent exam, I encountered some unforeseen circumstances that affected my ability to perform at my best. I believe that with additional time and preparation, I can demonstrate my understanding of the course material and improve my performance.

I have been actively seeking to improve my study habits and have been attending additional tutoring sessions to address my weaknesses. I am confident that a resit will provide me with the opportunity to better prepare and achieve a passing score.

Thank you for considering my request. I am looking forward to your response and to the possibility of resitting the exam. Please let me know if there are any additional requirements or steps I need to take to schedule the resit.

Thank you for your attention and cooperation.

Best regards,

[Your Full Name]

[Your Student ID]

[Your Contact Information]

```

通过遵循这些步骤和注意事项，你可以有效地发送留学补考邮件，并提高获得补考机会的可能性。