blush

The shy boy would always blush whenever the teacher called his name in front of the class.

(Chinese) 每当老师在全班面前叫到那个害羞男孩的名字时，他总是会脸红。

She felt her cheeks begin to blush as everyone started singing "Happy Birthday" to her.

(Chinese) 当大家开始为她唱“生日快乐”歌时，她感觉到自己的脸颊开始变红。