Enclosed 与 attached研究用法

enclose [inˈkləuz]
vt.围住，包住；把…装入信封，附入
例句：
"Enclosed you will find the account of the premium, for which I have debited your account &40.00."
同函奉上保险费帐目一份,上开金额为40英镑,我已记入贵方借方帐户。
--
A check is enclosed herewith.
随信附寄支票一张。
--
A drystone wall enclosed a graveyard where wildflowers grew.
清水石墙环抱着野花丛生的墓地。
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A girdle of islands enclosed the lagoon.
一环小岛围绕着礁湖。
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A laser beam travelling through an enclosed tube can carry as much information as 80 million TV channels!
在一个封闭管道中传输的激光束能传送多达8000万个电视频道的信息。
--
A list of the names of the contributors is enclosed herewith.
随信附上捐款人的名单。
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A man decides to go over Niagara Falls while enclosed in a large wooden box.
有一个人决定把自己封闭在一个木箱内,越过尼亚加拉瀑布。
--
A postpaid reply card is enclosed.
随函附上邮资已付的回信明信片一张。
attach [əˈtætʃ]
vt.连接；使依恋;认为有;使附属--
例句：
This middle school is attached to a teachers' college.
这所中学附属于一所师范院校。
He attached a label to his baggage.
他往行李上贴了一个标签。
We are much attached to each other.
我们之间感情深厚。

enclosed means, inside an evelope, a body of text; e.g., Please find enclosed ...

attached means, separate, joined/added to, outside the envelope, stapled or paperclipped to the main page; e.g., Please find attached ...

With e-mail, use enclosed if the document is inside the body of the e-mail message, and use attached if the document is not inside the body - is added as an .

if you attach something in an envelope,that is called enclosed

在现代商务实际操作中 两者完全可以替换