There was an air of easy assurance and calm about him.

他表现出从容自信和冷静。

《牛津词典》

There are several other reasons to remain calm about Saudi reserves.

此外，其他的几个理由也可以让我们放松对沙特石油储量的担忧。

youdao

Usually I am pretty calm about things but when I want to smoke a cigarette, I really want to smoke a cigarette.

我通常都是很冷静，可是除了想吸烟的时候例外。我是真的，想来一根。

youdao

You might say a person is as cool as a cucumber if he never seems to worry about anything and stays calm in a stressful situation.

VOA: special.2011.02.13

Milton had begun the sentence not with calm, prophetic certainty about his divine vocation. He began it with a far more secular set of images, a set of images that comes from the world of business.

弥尔顿并不是以一种先知对他天职，的冷静确信开始写的，他以,更世俗的比喻开始,生意上的比喻。

耶鲁公开课 - 弥尔顿课程节选

Pennsylvania Senator Arlen Specter, a Democrat, had his hands full trying to calm down a man in Lebanon, Pennsylvania, who was angry about being denied a chance to ask a question.

VOA: standard.2009.08.12

Our fund managers are remaining calm about the prospect of big currency adjustments over the coming year.

ECONOMIST: Our quarterly portfolio poll

Mr Clementi sought to calm nerves about an overheating housing market by denying there was a bubble.

ECONOMIST: House prices

In an interview with Bloomberg television Gorman says everyone just needs to calm down about the big bank breakup stuff.

FORBES: Don't Hold Your Breath, Big Banks Will Not Be Broken Up