Definition
To show no visible reaction of surprise, worry, or concern when something unexpected or alarming occurs.
眼皮也不眨一下；面不改色
He didn't bat an eyelid when the manager announced the company was going to lay off employees.
当经理宣布公司要裁员时，他面不改色。
She didn't bat an eyelid when her name was announced for Best Actress, as if she had expected it.
当她的名字被宣布为最佳女主角时，她面不改色，好像早就预料到了一样。
She didn't bat an eyelid even after being told that her investment was completely lost.
即使被告知她的投资完全亏损，她也面不改色。