In this sentence

①academic sthadj.学校的；学院的；学业的

Synonymsscholastic, educational, institutional

原句中的 Academy（学院/专科院校）是 academic 的词根名词形式。academic 作形容词时，最基础的用法即修饰与高等院校、专门学术机构或学业相关的机构和事物。

• Academic qualification is not a guarantee of intelligence.学历并不能作为智慧的保证。

②academic research / performanceadj.学术的；学究式的

Synonymsscholarly, intellectual

• Academic freedom is the indispensable requisite for unfettered research and the pursuit of truth.学术自由是不受约束的研究与追求真理必不可少的先决条件。

③sth is academicadj.纯理论的；空谈的（无实际意义的）

Synonymstheoretical, hypothetical, abstract

• Without action, knowledge is merely academic.缺少了行动，知识便只是一纸空谈。

④an academicn.大学教师；学者

Synonymsscholar, intellectual, researcher

• The role of an academic is not to provide answers, but to ask the right questions.学者的职责不是提供现成的答案，而是提出正确的问题。

In this sentence

①academy of sthn.专科院校；学会；研究院

Synonymsinstitute, conservatory, college

句中指专注于特定专业（音乐）的高等学府（英国皇家音乐学院），常以“Academy of + 学科/领域”命名，首字母通常大写。

• True knowledge is not confined to the halls of an academy, but belongs to whoever seeks it.真正的知识不仅局限于研究院的殿堂，而是属于每一个探索它的人。

②a military / police academyn.训练学校；军校 / 警校

Synonymstraining school, institution

• Discipline learned in the military academy is not meant to break the spirit, but to forge character.在军校中学到的纪律并非为了消磨心智，而是为了锤炼品格。

③an academyn.私立中学；专科中学

Synonymsprep school, secondary school

• The role of an academy is not merely to teach subjects, but to ignite curiosity for a lifetime.中学的使命不仅是传授科目，更是点燃一生的求知欲。