In this case, you are specifying only a text body.

在本例中，我们只指定了一个文本主体。

youdao

Any number of response text documents can have their rich or plain text body field appended to an email message.

许多回复文本文档都可以将其富文本或纯文本正文字段附加到电子邮件消息后。

youdao

There are three parts: preface, main content and conclusion, in which the main text body has three chapters.

全文共分前言、主文和结论三部分，其中主文共三章。

youdao

These include headline and link copy of different lengths, summaries, photos, audio and video files and body text (and their associated metadata.) All of these elements are created, managed and dispatched from a single interface and can be accessed with the highly structured language of its API.

FORBES: With All Content Moving Mobile, Karen McGrane Writes, The API's The Thing

It gives a rough indication of what a body of text is about.

FORBES: Visualization: A Picture Tells A Thousand Words

But, what happens when you get an email with an address in the body of the text?

FORBES: iOS 6 Map Flap: Should Apple Let Users Select Alternate Default Apps?