twilight zone
noun
1
- an urban area that is becoming dilapidated, with decrepit housing and accompanying social and economic degeneration城市衰败地区。
2
- a conceptual area which is undefined or intermediate边缘地区, 过渡区域：
the twilight zone between the middle and working classes.
中产阶级与工人阶级之间的过渡区域。
2.1
- a sphere of experience which appears sinister or dangerous because of its uncertainty, unpredictability, or ambiguity（经验中的）险恶地带, 危险区域：
schizophrenia isolates the individual in a twilight zone of terror.
精神分裂症将个人孤立于由恐惧构成的险恶区域之中。
3
- the lowest level of the ocean to which light can penetrate弱光层。