最可能的是介乎于二者之间。

The most likely answer lies somewhere in between.

他不老也不年轻，而是介乎两者之间。

He isn't old or young; he is in between.

他只是给出了一个介乎现实与记忆之间的超现实主义的世界。

He offers simply a surrealist world located between reality and memory.

潮流的最高时速一般介乎0.5浬 至1.5浬之间，在狭窄的海峡，流速可高达5浬。

Maximum tidal currents generally range from 0.5 to 1.5 knots and locally up to 5 knots at narrow channels.