adj.无感情的；无表情的；冷漠的；平静的
He listened with an impassive face. 他面无表情地听着。
He still wore the same impassive and preoccupied air. 他仍旧有那种心情缭乱而力自镇静的神气。
adv.无感情地
n.无感觉；缺乏热情；冷淡；无动于衷
