borderlines
n. 分界線,國界線( borderline的名詞複數 )
The borderline between two different or opposite things is the division between them.
...a task which involves exploring the borderline between painting and photography.
一項探究繪畫與攝影之間界線的工作
Something that is borderline is only just acceptable as a member of a class or group.
Some were obviously unsuitable and could be ruled out at once. Others were borderline cases.
一些明顯不合適,可以馬上排除。另一些則勉強合格。
The construction blueprint is full of borderlines. I am really blind to them.
這張建築圖紙滿是紅線, 我實在看不懂.