country, land, state, nation如何区分

country
KK: []
DJ: []
n.
1. 国家;国土[C]
He didn't know much about foreign countries.
他对外国知之甚少。
2. 祖国;故乡[C]
She loves her country very much.
她十分热爱祖国。
3. 全体国民[the S][J]
The country was stunned to learn of the death of the president.
听到总统逝世的消息,全国为之震惊。
4. 乡下,郊外[the S]
We lived in the country for more than ten years.
我们在乡下曾住过十多年。
5. (具有某种地理特点的)区域[U]
a.
1. 乡下的;乡村风味的;乡气的[Z][B]
Emily is a country music fan.
艾米莉是位乡村音乐迷。

land
KK: []
DJ: []
n.
1. 陆地[U]
Most mammals live on land.
大多数哺乳动物生活在陆地上。
2. 土地;田地[U]
He owns 300 acres of land.
他拥有三百英亩土地。
3. 国土,国家[C]
He has visited many distant lands.
他访问过许多遥远的国家。
4. 地产,田产[U][P1]
These lands belonged to my father.
这些地产过去是属于我父亲的。
5. 田园生活[the S]
He is tired of his city job and dreams of getting back to the land.
他厌倦城里的工作,渴望回去过田园生活。
vt.
1. 使登陆;使降落;使下车