经过认真考虑，很遗憾，我方不得不谢绝贵方的上述订单。

After careful consideration, we regret to say that we cannot but decline the said order.

youdao

因我方任务已满，抱歉不得不谢绝你方订单。

Owing to full commitments, we regret having to decline your order.

youdao

因我方任务已满，抱歉不得不谢绝你方订单。

Owing to full commitments, we regret having to decline your order.

youdao