n.

the lowest level of the ocean to which light can reach

the ambiguous region between two categories or states or conditions (usually containing some features of both)

同義詞：no man's land

Twilight zone?
Twilight Zone
twilight zone
To Protect and Serve (The Twilight Zone)
Tagged (The Twilight Zone)
Ye Gods (The Twilight Zone)
¿Ya tenemos director para "The Twilight Zone"?
Comentarios: ¿Ya tenemos director para "The Twilight Zone"?
Comentarios: The Twilight Zone (2015)
Twilight zone of protein sequence alignments
Rost, B. Twilight zone of protein sequence alignments. Protein Eng. 12, 85-94
On the signature of the cirrus twilight zone
Improving the quality of twilight-zone alignments