響法國嘅克萊蒙費朗大學 最近有個模仿研究 會要求參加者分辨 個笑容係真定假 同時佢哋要用個口擔住支鉛筆 去壓抑笑容肌
At the University of Clermont-Ferrand in France, a recent imitation workshop asked participants to distinguish between real and fake smiles, and to suppress their smiles with a pencil in their mouths