So you need to know what some of those are.

你们需要知道是哪些机构
The polis itself is just a Greek word for city.

Polis是希腊语中城市的意思
But you can't think of this as in huge cities like we have now.

但它与现代的大都市不可同日而语
What they would call a polis might only be 1000 citizens or 5000.

一个城邦可能只有一千到五千名居民
So it wasn't like millions of people.

不是那种有着上百万人口的城市
It wasn't nearly as big as Rome, which would consist of

不像如今的罗马
a million inhabitants fairly quickly around this time.

能够迅速聚居上百万居民
The poleis -- that's plural for a Greek city

Polis的复数是poleis者polises
the poleis or the polises, they were much smaller

与现代都市相比
than that, but they would have several things.

麻雀虽小五脏俱全
The city center, the town, would be the center of this,

市中心或者城区是它的中心地带
and that's where the institutions would be,

是各种机构的所在地