Today we discussed how economies can be broken down into the primary, secondary, and tertiary sectors.

今天我们讨论了如何将经济分解为第一产业、第二产业和第三产业。

And then the tertiary sector is the part of the economy that involves services rather than goods.

第三产业是经济中涉及服务而非商品的部分。

That’s because the tertiary sector – like all the economic sectors we’ve been discussing – is defined mainly by what it produces, rather than what kinds of jobs it includes.

这是因为第三产业——就像我们一直在讨论的所有经济部门一样——主要是由它生产什么来定义的，而不是它包括什么样的工作。

So, the US economy began with many workers serving in either the primary and secondary economic sectors, but now, much of the US economy is centered on the tertiary sector, or the service industry.

因此，美国经济开始时有许多工人在第一和第二经济部门服务，但现在，美国经济的大部分集中在第三产业或服务业。