a low-life bar的用法和样例：
- The government is trying to keep a low profile on this issue.
- Talking in a low voice were a man and a woman.
- Lead will fuse at quite a low temperature.
- Black, Mexican - American and American Indian elderly all have a lower life expectancy than whites, due to their socioeconomic disadvantages.
- The economy of the country is at a low ebb.
- How do they manage to subsist on such a low wage?