The negotiator remained impassive while the supplier explained the sudden price increase.

供應商解釋突然漲價的原因時，談判代表始終不動聲色。

During the interview, the hiring manager kept an impassive face, so I couldn't read her reaction.

面試時，招募經理一直面無表情，所以我看不出她的反應。

The customer service agent listened impassively as the angry guest complained about the delayed flight.

那位旅客因班機延誤而怒氣沖沖地抱怨，客服人員則面無表情地聽著。