“学术界”常见的英文表达有 academic circle（s） 或 academia。具体使用示例如下：
academic circle（s）：
This discovery has aroused great interest in the academic circles both at home and abroad.（这一发现引起了国内外学术界的极大兴趣。）
The research findings have been widely recognized in academic circles.（这项研究成果在学术界得到了广泛认可。）
academia：
He is a well-known figure in academia.（他在学术界是个知名人物。）
The new theory has sparked heated debates within academia.（这个新理论在学术界引发了激烈的讨论。）