out of focus的用法和样例：
- For me, your explanation is a bit out of focus.
- I throw my eyes out of focus, so that I see no particular object but only a seething kaleidoscope of colors.
- I don't like taking those drugs, they make my eyes go out of focus and I can't see clearly.
- The children's faces were badly out of focus (ie were very blurred) in the photograph.