a precarious living的用法和样例：
- He earns a precarious living as a window washer.
- He earned a precarious living as an artist.
- But by the time he had reached here a couple of years ago his money had run out and he had gone to live in the temple where he made a precarious living by working as a scrivener. For this reason Shiyin saw a good deal of him.
- Before liberation I was always wandering with my family from place to place,making a precarious living.
- She makes a rather precarious living as a novelist.