borderline

n.分界；边界线

adj.边缘的；接近的

The borderline between love and hate is often thin. 爱与恨的分隔总是很薄弱的。

This biography sometimes crosses the borderline between fact and fiction. 这部传记有时混淆了事实和虚构。

The two armies clashed on the borderline. 两军在边界发生了冲突。

I'm not sure whether to pass him or fail him; he's a borderline case. 我拿不定主意给他及格还是不及格，他处于两可的情况下。