面部无表情的

例句：

1. 1. The scientist's expressionless face made him seemeven more mysterious.
   科学家面无表情的脸让他看起来更神秘了。
2. 2. Shewas expressionless when sheheard the bad news.
   她听到那个坏消息时面无表情。
3. 3.He kept his emotions to himself and showedan expressionless calmness.
   他把自己的情感压在心底，表现出一种冷静而不动声色的样子。