suīrán / tā / píngshí / kàn / qǐlái / lǐxìng / dàn / nèixīn / de / bōdòng / wēi hū qí wēi / wàirén / gēnběn / kàn / bù / chūlái

虽然他平时看起来理性，但内心的波动微乎其微，外人根本看不出来。

Although he looks rational, his inner fluctuations are so slight that others cannot tell at all.