?團(tuán)城（拼音：tuán chéng）是指在古代，為防御外敵入侵而建造的城市式防御設(shè)施。它通常由城墻、城門、護(hù)城河等構(gòu)成，具有堅固的防御能力。

How to pronounce: tuán chéng [t-wan ch-ung]

Usage: 團(tuán)城 is used to refer to a fortified city or defensive structure built in ancient China.

Example Sentences:

1. 這座團(tuán)城是由秦始皇統(tǒng)一六國后修建的。

This fortified city was built by Emperor Qin Shihuang after he unified the six states.

2. 為了保護(hù)邊疆安全，當(dāng)時的決定修建一座團(tuán)城。

In order to protect the border, the government at that time decided to build a fortified city.

3. 這座團(tuán)城曾經(jīng)經(jīng)歷過多次戰(zhàn)爭，但始終未被攻破。

This fortified city has gone through many wars, but it has never been breached.

4. 城內(nèi)居民在團(tuán)城的保護(hù)下過著平靜安穩(wěn)的生活。

The residents inside the fortified city live a peaceful and stable life under its protection.

5. 團(tuán)城的設(shè)計巧妙，使敵人難以攻破。

The design of the fortified city is clever, making it difficult for enemies to breach.

Synonyms and Usage:

1. 城郭 (chéng guō): fortress; used to refer to a fortified city or defensive structure.

2. 城堡 (chéng bǎo): castle; used to refer to a large and fortified building typically built in the Middle Ages for protection against enemies.

3. 城市防御工事 (chéng shì fáng yù gōng shì): city defense works; used to describe the defensive structures and measures taken by a city to protect itself from potential threats.

Editor's Summary:

團(tuán)城 is a term used in ancient China to describe a fortified city or defensive structure built for protection against enemies. It is commonly seen in historical texts and has a strong cultural significance. Other similar terms such as 城郭 and 城堡 can also be used to refer to fortified cities, but they may have slightly different connotations. Overall, 團(tuán)城 is an important term in Chinese history and reflects the strategic thinking of ancient Chinese rulers in defending their territories.