N-SING
仪表；举止；神态；（尤指）面部表情
Someone's mien is their general appearance and manner, especially the expression on their face, which shows what they are feeling or thinking.
例句
It was impossible to tell from his mien whether he was offended.
从他的神态中难以看出他是否生气了。
...his mild manner and aristocratic mien.
他温文尔雅的举止和高贵风度