They never acted on the information they had.他们从未根据了解到的信息采取行动。

We were too late to act upon his suggestion.我们按照他的建议行事已为时太晚。

It's okay to feel angry or jealous, but you mustn't act on those feelings.生气或嫉妒都可以，可你千万不要因此有所行动。