为了在商业中成功，你需要在谈判中保持冷静。

To be successful in business, you need to ___keep ___a ___cool ___head in negotiations.

凯文设法保持冷静，并接管了导航。

Kevin managed to ___keep ___a ___cool ___head and took over the navigation.

在紧急情况下，她保持冷静，并迅速做出决定。

During the emergency, she ___kept ___a ___cool ___head and made quick decisions.