写信人及秘书姓名的首字母缩写的英文

reference initials

• 写信:    write; write lette ...
• 人:    human being; man; ...
• 及:    reach; come up to
• 秘书:    secretary
• 姓名:    surname and person ...
• 的:    4次方是 The fourth po ...
• 首字母:    initial; standing ...