他们的首要目标是维持低成本。

Their overriding aim was to keep costs low.

《牛津词典》

首要目标是抑制通货膨胀。

The prime aim is to keep inflation down.

《柯林斯英汉双解大词典》

首要目标通常是能准确地识别鸟类。

Accurate identification of birds is usually the first goal.

youdao

Women bear children. Well, around that fact comes a whole set of rights and obligations and duties, primarily to the family that have to be primary.

女人要生孩子，好，围绕这个事实,衍生出一整套权利，责任和义务，这些主要是对家庭而言，家庭是首要目标。

普林斯顿公开课 - 人性课程节选

Its principal good, its principal goal, was the education of citizens for positions of public leadership and high political responsibilities.

它的首要优点及目标，就是公民教育,训练公共领袖人员,及高标的政治责任。

耶鲁公开课 - 政治哲学导论课程节选

You need to pin down an object of study, a first principle from which other principles can emerge, and part of the process is to say, "Hey, it's not literature we're talking about.

首要原则是，需要锁定要谈论，即学习的目标，可是，谁知道什么是文学。

耶鲁公开课 - 文学理论导论课程节选