1
do something at one's convenience
常用于礼貌请求，one's 可根据主语替换为 your, his, her, its, our, their 等。
Please submit the report at your convenience.
请在您方便的时候提交报告。
最方便地，最合适地
先理解核心含义，再看它在真实句子里的用法。
最方便地，最合适地
at a time that is suitable or convenient for someone
Please submit the report at your convenience.
请在您方便的时候提交报告。
Please call me at your convenience to discuss the project.
请在你方便的时候给我打电话讨论这个项目。
You can reply at your convenience; there's no rush.
你可以在方便的时候回复，不着急。
Feel free to visit us at your convenience.
欢迎随时方便的时候来拜访我们。
常用于礼貌请求，one's 可根据主语替换为 your, his, her, its, our, their 等。
Please submit the report at your convenience.
请在您方便的时候提交报告。
置于句首更加强调时间灵活性。
At your convenience, please let me know your decision.
在您方便的时候，请告诉我您的决定。
Not this
Please call me in your convenience.
Use this
Please call me at your convenience.
受中文‘在你方便的时候’影响，误用介词in，英语固定搭配为at one's convenience。
Not this
Please call me at convenience.
Use this
Please call me at your convenience.
遗漏了所有格your/one's，导致短语不完整，必须使用所有格形式来明确指代对象。
Choose the next layer that will help you use at one's convenience with more confidence.
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use at one's convenience naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
多用于正式或礼貌的场合，强调在对方方便的时候进行某事。
Dictionary facts from ECDICT.