An E-mail message's structure is composed of the message header and the message body.

电子邮件的结构是由消息头和消息体组成的。

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The streptomycin molecule is composed of three moieties i. e. streptose, streptidine and N-methyl-L-glucosamine.

链霉素是由链霉糖、链霉胍和N甲基一L一葡萄糖胺三部分组成。

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An all-powerful group called the Alibaba Partnership, composed of 24 managers and 6 executives of its e-commerce partners, holds exclusive authority to nominate a majority of the firm's directors.

阿里巴巴有一个绝对权力团体，即阿里巴巴合伙人，其中包括24名阿里巴巴集团高层，以及6名来自公司电子商务合作伙伴的高管，该公司多数董事的提名权完全掌握在这个团体手中。

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Their results suggest 55 Cancri e is largely composed of carbon (in the form of graphite and diamond), iron, silicon carbide, and, potentially, silicates.

BBC: Oddballs: The strange worlds beyond our Solar System

National saving is composed of personal saving, business saving, and government saving, i.e. an excess of tax revenue over expenditures.

FORBES: How Fracking Can Reduce the Budget Deficit