primary

/ˈpraɪˌmɛri/

of first rank or importance or value; direct and immediate rather than secondary

中文释义：主要的；首要的；初级的

The primary goal of the project is to reduce carbon emissions.

该项目的主要目标是减少碳排放。

Primary education is compulsory for all children in this country.

在这个国家，初等教育对所有儿童都是义务的。