This is a formal invitation.

这是一封正式的邀请函。

Eg: I have sent them a formal invitation.

我已经寄给他们一份正式的邀请函。

Men—I would like to take this opportunity to extend your formal invitation.

男人们——我希望利用这个机会正式的邀请你们加入。

Men — I would like to take this opportunity to extend your formal invitation.

男性同胞们，就此机会，我向你们发出正式的邀请。

The second circular will be sent to the participants with a formal invitation and tentative schedule of the workshop.

承办方向参训人员发送正式邀请和培训初步行程时间表。

Carry out the pack in nuptial that very day to each detail, and together deliver to the guest of take part in wedding with the nuptial formal invitation the flowchart.

把婚礼当天的安排落实到每个细节，并将流程表随婚礼请柬一同寄给参加婚礼的宾客。