unperturbed
adj. 镇定的；平静的；未受到扰乱的
例句
She seemed unperturbed by the news.
她听到这消息似乎并不惊慌。
《牛津词典》
Harvard took the lead and remained unperturbed by the repeated challenges.
哈佛取得了领先地位，经过再三挑战后仍然镇定自若。
《柯林斯英汉双解大词典》
At forty, I attained to an unperturbed mind.
我四十不动心。
