at the forefront of sth.中等

California has been at the forefront of state privacy efforts with the California Consumer Privacy Act of 2018.

加利福尼亚州凭借2018年的《加州消费者隐私法》走在了各州隐私保护工作的前列。

Zoos are at the forefront of conservation and constantly evolving to improve how they care for animals and protect each species in its natural habitat.

动物园站在动物保护的最前沿，并在不断发展，以改进照料动物的方式，并在自然栖息地中保护每一个物种。