If you describe a society as civilized, you mean that it is advanced and has established laws and customs.
I believed that in civilized countries, torture had ended long ago.
我相信在文明国家酷刑早就废止了。
If you describe a person or their behaviour as civilized, you mean that they are polite and reasonable.
I wrote to my ex-wife last week. She was very civilized about it.
上个星期我写信给我的前妻。对此她表现得彬彬有礼。