（12）高兴，愉快，欣慰
To have the pleasure to do; To have the pleasure of doing; To have pleasure to do; to have pleasure in (of) doing; To take (a) pleasure in doing (something); To take pleasure in doing (something); To be pleased to (with)(by); to be delighted at (in)(with); To be glad to (of)(about); To be rejoiced in (at).
（13）随函附件
Enclose; Inclose.
（14）迅速，立刻
Urgently; Promptly; Immediately; With all speed; At once; With dispatch; With all despatch; With the quickest possible despatch; With the least possible delay; As soon as possible; As quickly as possible; As promptly as possible; At one‘s earliest convenience; At the earliest possible moment; At an early date; Without delay; Without loss of time; Immediately on receipt of this letter; By express messenger; By Special messenger; By special delivery; By express letter.
（15）回信
By return; By return of post; By return of mail; By return of air-mail.
（16）依照
According to; Agreeably to; Conformably to; pursuant to; In accordance with; In conformity with (to); In obedience to; In deference to; In compliance with; In agreement with; In pursuance of.
（17）就……，关于
About; Regarding; Concerning; As to; As regards; With regard to; In regard to;(of); Respecting; Relative to; Anent; In connection with; Referring to; With reference to; In reference to; Re.
（18）期满到期及应付之款
To be due; To fall due (become) due(日期将到); Duly(正时，及时); In due Course (依照顺序).
（19）每个，按照，通过
Per(=by, through) rail.(post,mail,steamer)(通过铁路，邮政，轮船)
Per pro.= by proxy (由代理)
Per annum (=yearly，每年)
Per mensem (=monthly,每月)
Per diem [daiem] (=daily,每日)
Per man, per capital (=per head,依照人数，每一人)
Per piece(每一个，每一件)
（20）表示抱歉（冒昧做了某事）
To take the liberty of doing something; To take the liberty to do something; To take the liberty in doing something.
（21）甚感遗憾，请包涵
To regret; To be sorry; To be chagrined; To be mortified; To be vexed; To regret to say; To be sorry to say; To one‘s regret; To feel a great regret for; To express regret; To be regretted; To be a matter for regret; To be regrettable; To be deplorable.
（22）（我们）对于...甚感荣幸
To have the honour of doing (being); To have the honour to do (be); To do one (oneself) the honour of doing (being); To esteem (regard) it as a high honour to do (be); To appreciate the honour to do (be); To feel honoured to do (be); To owe one a debt of honour to do (be); To be honoured with doing (being) something; To honour one with doing (being) something.
（23）请
Please; Kindly; be good enough; Be kind enough; Have the kindness.
（24）感谢，衷心感谢等