他显得镇静自若，遇事不惊。

He looked as if nothing could faze him.

《牛津词典》

林肯非常惊讶，但是他假装镇静自若。

Lincoln was very surprised, but he pretended to be calm.

youdao

我有点紧张，我努力使自己镇静自若。

I'm shaking, trying to hold something inside.

youdao

他可以想象出她现在的样子——镇静自若，胸有成竹。

He could visualize her now-composed and competent.

youdao

我以为他会发火，但他却不声不响地坐在办公桌旁，像法官一样镇静自若。

I had expected him to be angry, but instead he sat quietly at his desk, as sober as a judge.

youdao

我以为他会发火，但他却不声不响地坐在办公桌旁，像法官一样镇静自若。

I had expected him to be angry, but instead he sat quietly at his desk, as sober as a judge.

youdao