He behaves throughout with a certain sang-froid.

他一直表现得很镇静。

《柯林斯英汉双解大词典》

J'ai froid -> I'm cold; and J'ai chaud -> I'm hot.

例如，J'ai froid->我很冷；J'ai chaud->我很热。

youdao

Perhaps this points to an admirable sang froid on the part of investors.

或许这就是投资者临危不乱的可敬品质之一。

youdao

By contrast, on television, where he has been appearing more frequently, he acts with uncanny sang-froid.

NEWYORKER: No Secrets

And it was the French who had words like "sang-froid" and "insouciance" to describe qualities that the British did not yet appear to possess.

BBC: The end of the stiff upper lip?

Sadly, sang-froid was in short supply Stateside, and by the time Casey arrived in Seville for the first round of the World Cup, the Americans had manned the barricades.

BBC: Candid Casey eyes fresh start