绷脸

例句：

1. 1. He tried to smile, but his face remained tense.
   他试图微笑，但脸上仍然紧绷。
2. 2. She was so nervous that she couldn't help but wrinkle her nose in a forcedsmile.
   她非常紧张，不由自主地皱起了鼻子，勉强挤出一个笑容。
3. 3. The actor deliberately adopted a stern expression on stage, making the audience feel as if hehad "bent his face".
   这位演员在舞台上刻意摆出一副严肃的表情，让观众感觉仿佛他已经“绷紧了脸”。