a solo effort的用法和样例：
- But thwarting climate change isn't a solo effort.
- And this trip's being presented not as a solo effort, but as part of a concerted international initiative leading up to a possible Marshall Plan for Africa to be agreed at a G-8 summit in June.
- He has been asked to sing a solo at the concert.
- I draw the line at singing a solo in public. I'll tell jokes but I won't sing.
- WY: You could do a solo exhibition.
- A solo with or without accompaniment.