Regarding the issue you raised, we have launched an investigation.

关于您提到的问题，我们已经展开了调查。

同一单元的其他句子

• I am writing to follow up on our previous discussion regarding the contract terms.我写信是为了跟进我们之前关于合同条款的讨论。
• Could you please review the attached proposal and provide your feedback by Friday?请审阅附件中的提案并在周五前提供反馈。
• We would like to request an extension for the project deadline.我们希望申请延长项目截止日期。
• Please find attached the revised version of the agreement for your signature.附件是修改后的协议版本，请签名。
• I am reaching out to inquire about the status of our recent order.我联系您是想询问我们最近订单的状态。