to be wide-ranging; to be diverse; to cover a lot of ground; to cover various topics
to be wide-ranging; to be diverse; to cover a lot of ground; to cover various topics
complex and wide-ranging; labyrinthine
wide-ranging and diverse; multifarious
① 内容が多方面に渡りすぎて学問の真理を得ることがむずかしいこと。② 方針が多すぎてどうしてよいか迷うこと。
extensive and wide-ranging