一、作为名词的用法

表示“州”

The state of California is known for its beaches and technology industry.

（加利福尼亚州以海滩和技术产业闻名。）

表示“国家”

The United States is a federal state with 50 constituent states.

（美国是一个由50个州组成的联邦制国家。）

表示“状态”或“情况”

The company is in a state of emergency due to the power outage.

（由于停电，公司处于紧急状态。）

其他含义

The state of the art technology was on display at the conference.

（最先进的科技在会议上展出。）

二、作为动词的用法

表示“声明”或“说明”

The mayor stated that the project would be completed by next year.

（市长说明项目将于明年完成。）

表示“使处于某种状态”

The weather has put the city in a state of disarray.

（天气使城市陷入混乱状态。）

三、补充说明

形容词/副词

The state of the economy is improving.

The company operated in a state of secrecy.

派生词：

statewide（遍及全州）：The campaign was successful statewide.

interstate（州际的）：The interstate highway connects all major cities.

通过以上例句，可全面理解“state”在不同语境下的用法。