nuance

1. N-VAR A nuance is a small difference in sound, feeling, appearance, or meaning. (声音、感觉、外貌或意义等方面的) 细微差别

We can use our eyes and facial expressions to communicate virtually every subtle nuance of emotion there is. 我们可以用眼睛和面部表情来如实地传达情感上的每一丝细微差别。