以下是100词左右的英语道歉信模板及其中文翻译，结合了不同场景的常用表达：
模板一：因失约道歉
Dear [Name],
I sincerely apologize for not being able to attend your event on [date]. Due to [reason] （e.g., sudden illness, unexpected traffic）, I regret any inconvenience this may have caused. I hope you can understand and forgive me. Thank you for your understanding.
Sincerely, [Your Name]
模板二：因错误道歉
Dear [Name],
I am writing to apologize for the mistake I made [on date] regarding [specific issue] （e.g., miscommunication, oversight）. I acknowledge that my actions were unacceptable and deeply regret any harm caused. I will take immediate steps to [correct the mistake] and prevent it from happening again. Please accept my sincerest apologies.
Sincerely, [Your Name]
模板三：正式商务道歉
Dear [Recipient's Name],
We regret to inform you that [issue] has occurred, which has resulted in [impact] on your business. We take full responsibility for our error and are committed to [remediation steps] （e.g., compensation, improvement plan）. We value your business and hope to regain your trust. Please let us know how we can assist you further.
Sincerely, [Your Company]
翻译示例：
模板一翻译
亲爱的[姓名]，
我真诚地为未能参加你[日期]的活动道歉。由于原因，我遗憾地给你的计划带来了不便。希望你能理解并原谅我。感谢你的谅解。此致，[你的姓名]
写作建议：
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开头直接说明道歉原因，避免推诿；
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表达对后果的悔意，避免使用"if it wasn't for"等逃避性语言；
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提出具体补救措施，增加可信度；
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结尾使用"Please accept my sincerest apologies"等标准表达。