at the forefront of something

Từ điển Oxford Advanced Learner 8th

at/in/to the ˈforefront (of sth) idiom
in or into an important or leading position in a particular group or activity
•Women have always been at the forefront of the Green movement.
•The new product took the company to the forefront of the computer software field.
•This latest protest has brought prison conditions to the forefront of public attention.
•The court case was constantly in the forefront of my mind (= I thought about it all the time).
Main entry: ↑forefront_idiom