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。

youdao

The exhibition designing of human society is composed by different digital medias, e. g. graphic and image, the space of exhibition, the symbol environment and the multimedia technology.

本文认为，人类社会的展示设计是由数字媒体进行总体构成：图形影像、展示空间环境、符号环境和多媒体技术。

youdao

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。

youdao

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