But we also need to stop thinking that a middle class can be sustained only by factory jobs.

但是，美国也需要停下来思考，中产阶级为何只能通过工厂工作来维持。

youdao

The factory can only supply forty per cent of what we need.

这家工厂只能供应我们所需得百分之四十。

youdao

Only under special circumstances when the factory pollutes, do we need to regulate it.

只要工厂污染环境，我们就要严加管制。

youdao

The factory can only supply thirty percent of what we need.

这家工厂只能供应我们所需要的百分之三十。

youdao

The factory can only supply thirty percent of what we need.

这家工厂只能供应我们所需要的百分之三十。

youdao