Definition
A transitional or ambiguous state where two distinct ways of life or states of existence meet.
模棱兩可地帶，黑白不分地帶
She found herself in the twilight zone between adolescence and adulthood, not quite a child, and not yet fully an adult.
她發現自己處在青少年和成年之間的模糊地帶，既不完全像個孩子，也尚未完全成為成年人。
The project is in the twilight zone between research and commercialization, needing clear direction.
這個項目正處在研究和商業化的過渡階段，需要明確的方向。
After the accident, he lingered in the twilight zone between life and death.
事故發生後，他在生與死的模糊地帶徘徊。