Here are my calculations. They're a little rough and ready as yet, but you'll get a general idea.这是我的计算结果，虽然目前还有点粗略，但你可以大概了解一下。We have a general idea of what we want, but nothing concrete at the moment.我们对需要什么有个大致的想法，可是具体的东西目前还没有想好。I just want a general idea.我只想有个大致的概念。This guidebook will give you a good general idea of the city.这本导游书能使你对该城市有个很好的总体概念。