poker-faced
adj. 没有表情的；一本正经的
近义词：expressionless，impassive，deadpan，glassy，blank，reactionless，emotionless，straight-faced，unexpressive，
英英释义
Adjective
- deliberately impassive in manner;
"deadpan humor" "his face remained expressionless as the verdict was read"
例句
用作形容词(adj.)
- You need a dead-pan face to be a successful poker player.成功地扮演一位没有表情的演员，你需要一副冷面孔。