a pretty picture的用法和样例：
- And they can see you eat while they pass and that's a pretty picture too.
- He paints a pretty picture, I'm sure you'll agree, but nothing comes of it.
- Water, mountain, tree, villas and sky become a pretty picture by an artist in colors of white, green and yellow.
- "This is not a complicated picture. And it's not a pretty picture," says Jim Toedtman, editor of the AARP Bulletin.
- I paid a pretty penny for that picture.