borderline
n line that marks a border 邊界線; 國境線; 分界線
(fig 比喻) The borderline between informal language and slang is hard to define. 口語和俚語之間的分界線是很難確定的. adj between two different groups or categories 介乎兩種組別或類型之間的
a borderline case 難以確定的兩可情況
a borderline candidate, ie sb who may or may not pass an examination, be suitable for a job, etc 邊緣人物(可能及格也可能不及格的考生, 可能勝任也可能不勝任工作等的候選人)
a borderline pass/failure (in an examination) (考試)在及格與不及格兩可的情況下及格[不及格].