农业在国家的经济中扮演着重要角色。

Agriculture plays a vital role in the ___economy of the country.

为了节约开支，他们精打细算地使用每一分钱。

They practice ___economy by carefully budgeting every penny.

农业经济是这个地区的主要收入来源。

The agricultural ___economy is the main income source in this region.