a picture frame的用法和样例：
- If a picture frame is on top of a text frame, the text is hidden.
- If you click Insert as Picture, Publisher inserts a merge field within a picture frame into the Catalog Merge Area.
- After inserting and sizing the empty picture frame, you can apply formatting to it as if it were a picture.
- Those decals, I always hate that when you buy a picture frame and the sticker's on it.
- The properties of plain carbon fabric prepreg were researched using a picture frame shear rig which is(installed) on a mechanical test machine.