We strongly recommend that this method is cost-effective.
我們強烈推薦這種高成本效益的方法。
We deeply regret that we did not meet the deadline.
未能按期完成,我們深表遺憾。
We totally reject your final offer.
我們完全不接受你們的最終報價。
We fully admit that our service is not to your satisfaction.
我們完全承認我們的服務沒能讓您滿意。
We sincerely hope that you have enjoyed our services.
我們真心希望您滿意我們的服務。
We categorically deny your accusations.
我們堅決否認你們的指控。