然后，通过邮局发送信件，此时信是由写有地址的信封和里面的消息组成。
You then send your letter, which now consists of the addressed envelope and the message inside, to the post office.
SOAP消息由一个包括头和主体的信封组成。
SOAP messages consist of an envelope that contains a header and a body.
本实用新型属信封的改进。由信封、粘胶层、覆盖层组成。
The utility model belongs to the envelope improvement, composed of an envelope, an adhesive layer and a covering layer.
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