[usually before noun] most important

首要的，主要的;

Our primary concern is to provide the refugees with food and healthcare.

我们的头等大事是给难民提供食品和医疗。

Many of the villagers rely on fishing as their primary source of income.

很多村民以打鱼作为他们的主要收入来源。

Their primary objective is to make money.

他们的主要目标是赚钱。

Personal safety is of primary importance .

人身安全至关重要。

[only before noun] [especially BrE] relating to the education of children between five and eleven years old

小学教育的，初级教育的;

a primary teacher

一名小学老师

primary education

小学校育

teaching at primary level

在小学教学

happening or developing before other things

原始的; 最初的:

a primary tumour

早期肿瘤

Counselling was given as a primary therapy for depression.

心理咨询是抑郁症的基础治疗。

a primary election

初选

[BrE] a primary school

小学