内容的英文：
content
substance
details

参考例句：

There is an introduction in the front of the book,which tells you about the book.
卷首有一篇引言介绍书的内容。

Every boy and girl had a theory about the nature of that book.
至于那本书的内容，孩子们七嘴八舌，各抒己见。

The contents are multifarious and disorderly.
内容庞杂。

Content provider
内容供应商

Substantial in content
内容翔实

Evisceration of orbit
眶内容剜出术

The first step is to read the contents of a punch card into a core.
第一步是把穿孔卡的内容读入磁芯。

We gotta(have got to) review these ancient articles we have learnt.
我们要把学过的文言文内容复习好

Relative to the on-CPU cache, main memory is positively crawling
高速缓存与主存中的内容必须保持一致。

The binding and layout of this book is out of keeping with it's content
这本书的装帧和设计与内容不协调。

content是什么意思：
n. 内容；容量；目录；满足
v. 使满足
adj. 满足的，满意的

No man is content
人心不知足

Content is happiness
知足常乐

No man is content with his lot
无人满意自身的命运和境遇

substance是什么意思：
n. 物质；实质；主旨；资产

Concentration of a substance in solution or the strength of such a substance determined by titration.
滴定度用滴定的方式测定的一种物质的溶液浓度或这种物质的浓度

It's a material of substance.
那是一种坚固的材料。

To spot or stain, as with a discoloring substance.
玷污，弄赃因某种褪色物质弄脏、染污

details是什么意思：
n. 细节，详情；细枝末节，琐事；细部
v. 详述；选派；画详图

elevation detail
立面细部

The devil is in the details.
细节决定成败。

A particular detail or circumstance.
详情详尽的细节或情形