Emergency medical services; public system providing urgent prehospital care and transport.

紧急医疗服务；提供院前急救与转运的公共体系。

Express Mail Service; international express postal delivery network.

特快专递；国际邮政速递网络。

Electronics manufacturing services; outsourced design, assembly, and testing for electronics brands.

电子制造服务；为品牌提供外包的设计、组装与测试。

Environmental management system; organizational processes to monitor and improve environmental impact.

环境管理体系；用于监测并改进环境影响的组织流程。

Expanded Memory Specification; DOS-era standard for accessing extra memory.

扩展内存规范；DOS时代用于访问额外内存的标准。

Uppercase form of ems; plural of em, a typesetting unit equal to the point size.

ems 的大写形式；em 的复数，等于字号的排版单位。

Plural of EM; the name of the Latin letter M.

EM 的复数；拉丁字母 M 的名称。