dead-pan

adj expressionless 无表情的: a dead-pan face/look 无表情的脸[目光] * dead-pan humour, ie when the speaker pretends to be very serious 无表情的幽默（说话人故作严肃认真）.

DDT, de facto, de jure, de luxe, de rigueur, de trop, de-, de-escalate, de-escalation, de-ice, de-icer, deacon, deaconess, deactivate, dead, dead heat, dead man's handle, dead reckoning, dead weight, dead-beat, deaden, deadened, deadline, deadliness, deadlock, deadly, deadly nightshade, deadpan, deaf, deaf mute, deaf-aid, deaf-and-dumb, deafen, deafening, deafeningly, deafness, deal, deal in, deal out, deal with,