Well, we would say that we need these businesses because they perform a vital economic function.

好吧，我们会说我们需要这些企业， 因为它们发挥着重要的经济功能。

And we're going to have to find a way to maintain the critical economic and social functions of these towns if we're to have any hope of combating climate change.

如果我们想要对抗气候变化，就必须找到一种方法来维持这些城镇的关键经济和社会功能。