circumvallation

circumvallation的音标是[ˌsɜːkmɪˈveɪləns]，基本翻译是“包围，环绕；城郭”。速记技巧是：circum-环绕，-vallation名词后缀，表示“…化”。

Circumvallation这个词的词源可以追溯到拉丁语，意为“包围，环绕”。它的变化形式主要有复数形式circumvallations，过去式circumvallated，过去分词circumvallated。

相关单词：

1. encirclement：意为“包围，环绕”，其词源与circumvallation有相似之处，都表示围绕、包围的意思。

2. perimeter：意为“周长”，可以理解为物体或区域的边缘周长，这与circumvallation有相关性，因为circumvallation本身就是指围绕某物或区域一周。

3. circumference：意为“圆周”，与circumvallation都与圆形有关，都表示围绕圆形的周边。

4. circumscribe：意为“画圆”，与circumvallation都含有画界限或边界的意思。

5. circumambulation：意为“环行”，与circumvallation都有围绕行走的意思。

以上这些单词都与circumvallation有密切的关联，并且可以用来解释这个词的词源和变化形式。每个单词至少可以给出不少于100字的解释。

常用短语：

1. circumvallate

2. surround with ramparts

3. fortify with ramparts

4. fortress

5. rampart

6. encircle with ramparts

7. fortification

例句：

1. The enemy was circumvallated by our army, and they were forced to surrender.

2. The fortress was surrounded by high ramparts, making it difficult for anyone to enter.

3. The city was fortified with high walls and towers, making it difficult to attack.

4. The ramparts of the castle are a symbol of the country"s defense strength.

5. The enemy was encircled by our army, and they were trapped without any escape route.

6. The fortification of the city was a crucial step in ensuring its defense against attackers.

7. The ramparts of the ancient city are a testament to its rich history and culture.

英文小作文：

The ramparts of the ancient city are a beautiful sight, surrounded by lush green trees and flowers. These walls have witnessed many historical events and have served as a symbol of defense for the city for centuries. People come from all over to admire these ancient structures and learn about the city"s rich history and culture. The ramparts also serve as a reminder of the resilience of human beings in the face of adversity and challenges, and inspire us to be more resilient in our own lives.