名詞 borderline:

1. a line that indicates a boundary
   同義詞：boundary line, border, delimitation, mete

形容詞 borderline:

1. of questionable or minimal quality
   同義詞：marginal

1. I'm not sure whether to pass him or fail him; he's a borderline case.
   我拿不定主意給他及格還是不及格，他處于兩可的情況下。

bor.der.line

n.（名詞）
A line that establishes or marks a border.
邊界線：確立或標志邊界的線
An indefinite area intermediate between two qualities or conditions:
模糊地帶：在兩種狀態(tài)或狀況間模糊不清的不確定地區(qū)：
例句：
The borderline between love and hate is often thin.
愛與恨的分隔總是很薄弱的

adj.（形容詞）

Verging on a given quality or condition:
臨界線上的：在給定狀況的邊緣上的：
例句：
borderline poverty.
貧困線

Of a questionable nature or quality; dubious:
可疑的：特性或品性可疑的；不明確的：
例句：
an applicant with borderline qualifications.
資格可疑的申請人

Psychology Relating to any phenomenon that is intermediate between two groups and not clearly categorized in either group:
【心理學】 兩可的：一種在兩個類別之間模糊不清，沒有辦法將其清楚歸入任一類的現(xiàn)象有關(guān)的：
例句：
a borderline state showing the characteristics of both neurotic and psychotic reactions.
同時表現(xiàn)出神經(jīng)反應和生理反應特征的兩可狀態(tài)

Relating to a condition characterized by a pattern of instability in mood, interpersonal relations, and self-image and manifested by self-destructive, manipulative, and inconsistent behavior:
精神紊亂之邊緣的：與一種帶有情緒、人際關(guān)系和對自己看法不穩(wěn)定為特征，表現(xiàn)出自毀的、操縱的和不一致的行為的狀態(tài)有關(guān)的：
例句：
the borderline personality disorder; the borderline syndrome.
人格混亂的邊緣；邊緣綜合癥