1869, "strip of land along a frontier," from border (n.) + line (n.). As an adjective meaning "verging on" it is attested from 1907, originally in medical jargon.
雙語例句
1. In borderline cases teachers will take the final decision, based on the student's previous work.
在難以定奪的情況下，教師將根據(jù)學生先前的作業(yè)做出最終評分。
來自《權威詞典》
2. After the exams, the teacher gave all borderline cases a spoken test.
考試后老師對那些在及格線上下的學生進行了一次口試.
來自《簡明英漢詞典》
3. She's on the borderline between a first - and second - class honours degree.
她介于 一等 和二等榮譽學位之間.
來自《簡明英漢詞典》
4. 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。
來自柯林斯例句
5. Palmer Kirby worked in the borderline where commerce exploited science.