express as 、express in、by express。

express as作动词短语，意思为表示成、以……表示。例句：I will send it to you by express as soon as possible.(意思是：我会马上把它快递给你。）

express in意思是表达，用……陈述。例句：My gratitude is more than I can express in words. （意思是：我的感激之情并非言辞所能表达。）

by express意思是通过快递，用快递。

例句：Excuse me. Can I deliver the file by express? （意思是：不好意思。我可以用快递寄送这份文件吗？）

一、详细用法：

adj.明确的

例句：

The doctor gave express orders that the patient was to have no visitors.

医生明确嘱咐，那个病人不可会客。

The ship was sunk on express orders from the Prime Minister.

遵照首相的明确指令，那艘船被击沉了。

专门的

例句：

I gave you this task with the express purpose.

我给你这个任务是出于特殊的目的。

例句：

It was against her father's express command.

这违背了她父亲的特别嘱咐。

迅速的

例句：

That is an express elevator.

那是一个高速电梯。

例句：

That express bus goes direct to the airport.这个直达车直接到机场。

adv.用快递方式

例句：

The parcel was sent express.这包裹是用快邮寄的。

n.快递

例句：

We will consign the goods to him by express.

我们将以快递把货物寄给他。

Federal Express or UPS, please.

请用联邦快递或是优必速。

捷运公司，快车

例句：

I want to go by limited express.

我想搭特别快车去。

The London to Edinburgh express steamed into Newcastle fight on time.

从伦敦到爱丁堡的快车准时驶抵纽卡斯尔。

v. 表达，表述，表示 [T]

例句：

She couldn't express her emotions correctly.

她不会恰当的表达自己的感情。

例句：

I would like to express my thanks for all that you have done.

我想对你所做的一切表示我的感谢。

体现 [T]

例句：

Refined concepts require words to express the nuances, words are thence created.

概念要精细，需要用文字来不同的概念，文字也因而产生。

Balzac was a great artist striving to express a world and a life he hated.

巴尔扎克是一位伟大的艺术家，他以极大努力来描绘他所憎恨的社会和生活。

快递 [T]

例句：

I will express the parcel to you.我将把包裹快递邮寄给你。

As soon as I receive payment I will express the book to you.我一收到付款就会将书快递给你。

二、相关短语：

express mail 快件，快信

express trust 明示信托

pony express . 驿马快信的制度。