Как по Английски будет 理论上的

adjective

Having the nature of a theorem; involving deduction, especially of facts which are not direct consequences of existing or assumed knowledge.

adjective

Another term for theoretical.

adjective

Concerned with or involving the theory of a subject or area of study rather than its practical application.

Примеры использования:

A theoretical physicist

noun

The conceptual basis of a subject or area of study. often opposed to practic, practice.

adjective

Relating to a fund established in athens for the purpose of subsidizing attendance at the theatre and other public festivals; designating such a fund.