1. Now let me tell you the office rules first.
让我先给你讲下办公制度。
还能这样说：
I will give you an introduction of the office rules first.
You should have knowledge of the office rules first.
应用解析：
lost and found office 失物招领处；
office of entry 入境办事处；
register office 职业介绍所；注册处

2. The Human Resources trains all the new employees.
人力资源培训所有的新员工。
还能这样说：
Human Resource Department is organizing the training for the new staff members.
All new employees should be trained first by the human resources.
谚语：
Grasp all, lose all.
样样都抓，样样失掉；贪多必失。

3. Please memorize your employee number.
请记住你的员工编号。
还能这样说：
Please keep your employee number in your mind.
Please don't forget your employee number.
应用解析：
get sb.'s number 晓得某人真正的动机；
back number 过期；
special number 特别刊号；
winning number 获奖号；
lucky number 吉祥数

4. Be sure not to be late or absent.
务必不要迟到或缺席。
还能这样说：
Make sure that not to be late or absent.
Please on time.
谚语：
Long absent, soon forgotten.
别久情疏。