国事的英文：
national affairs

参考例句：

To deliberate on the affairs of state
筹议国事

The country is in dire confusion
国事蜩螗

The Prime Minister guides the state.
首相掌管国事。

He himself was getting old and the cares of government were becoming too much for him
他年事已高，力不从心，胜任不了国事的操劳。

In England, the sovereign reigns but does not rule.
在英国，君主是国家元首，但不治理国事。

In Britain the sovereign reigns but does not govern.
在英国，君主称王，但不治理国事。

national是什么意思：
adj. 国家的；全国的；国民的；民族的；国有的
n. 国民

Here is not merely a nation but a teeming nation of nations
这里不仅是一个国家，而是许多国家丰富的总和。

release of nationality
国籍解除; 放弃（脱离）国籍

a tributary nation
进贡国,2. 辅助的,3. 支流的,n.[C]1. 进贡国,附庸国[(+to)]2. 进贡者,3. 支流

The conception of the United Nations was in 1945.
联合国创始于一九四五年。

She is a nationally known writer.
她是全国知名作家。

affairs是什么意思：
n. 事务；事件；风流韵事

You have to investigate into this affair.
你必须调查研究这件事。

The affair had a strange sequel.
这一事件的结局很奇怪。

A committee was constituted to investigate into that affair.
建立了一个委员会以调查那件事。

They hired agents to conduct their affairs.
他们雇请代理人来处理他们的事务。

I was to be in a cleft stick at this affair.
我在这件事上进退维谷。