n.主意,想法,[哲]理念,观念,[乐]乐句,模糊想法
They have only a vague idea of the amount of water available.
他们只是大概知道可用水的总量。
I have a fair idea of how difficult things can be.
我大致了解情况会有多困难。
Professor Baker is unacquainted with the idea of representative democracy.
贝克教授并不熟悉“代议制民主”这一思想。