毫无表情地

例句：

1. 1. The policeman was expressionless as he spoke to the suspect.
   警察在与嫌疑人交谈时面无表情。
2. 2.The scientist's face was expressionless when he announced the results.
   科学家宣布结果时面无表情。
3. 3.The actor gave an expressionless look at the camera.
   演员对着摄像机露出一个无表情的表情。