国粹的英文：
the quintessence of a country

Preserve the national heritage
保存国粹

Beijing opera is the quintessence of Chinese culture.
京剧是中华民族的国粹。

He is the quintessence of tact and politeness.
他处世谦恭得体。

But what they are really attacking is the quintessence of Marxism
但是他们所攻击的正是马克思主义的最根本的东西。

The theory of the dictatorship of the proletariat is the quintessence of Marxism
无产阶级专政的理论是马克思主义的精髓。

Unconsciousness theory is one of the quintessences of the spiritual analysis.
潜意识理论是精神分析学说的精髓之一。

Her book captures the quintessence of Renaissance humanism.
她的书抓住了文艺复兴时期人文主义的精髓.

The country was in ferment.
那个国家处于动乱中。

It is the trademark of the country.
它是该国的标志。

This is an agricultural country.
这是个以农业为主的国家。

That country is transforming from a backward agricultural country into an advanced industrial country.
该国正在从落后的农业国转变为先进的工业国。

The country agreed to confederate with the neighboring country for mutual safety.
这个国家同意为了共同的安全而与邻国结盟。