须知的英文：
preliminary instructions
rules that must be known before starting sth

参考例句：

Enjoy the disco you' re only young once
尽情跳起迪斯科--须知青春只一度

Instructions for filling the form
填表须知

PASSENGER INFORMATION
旅客须知

It must be borne in mind that the victory is hard-won
须知胜利来之不易。

Tips for Netscape users
Netscape用户使用须知

Please message the instruction by cable.
请用电报传送使用须知。

A book which will tell you all you need to know about personal taxation
说明个人纳税须知的书

Sender's instructions in case of non-delivery (at sender's expense)
如无法投递，寄件人(费用自理)须知

Travellers are reminded that malaria tablets are advisable.
旅客须知要服用预防疟疾药.

You will find information about safety procedures in the pocket in front of you,eg on an aircraft.
在您座位前方的袋子里有安全措施须知(如在飞机上).

preliminary是什么意思：
adj. 初步的，开始的；预备的
n. 准备；初步措施；预赛

preliminary drawing for later elaboration.
先大体绘制出来，过后再进行精心制作。

Preliminary inquiries,experiments,negotiations
初步的调查、实验、谈判

Ⅰ. The Preliminary Data of Information Development in China
Ⅰ.全国信息化发展基础数据

instructions是什么意思：
n. 操作指南；命令，指令；传授

instruction cache
指令高速缓冲存储器

Not instructed; untaught.
未经训练的未受训练的，未教育的

To prepare an instructional sequence for(material to be taught)in programmed instruction.
编排在计划教学中为(教学材料)准备教学指导的次序。

rules是什么意思：
n. 规则；惯例；统治
v. 控制，影响；规定；统治

rule of detachment
分离规则

commutation rule
交换法则

This is what ruling is!
这就是统治的意义！