cordon off的音標為[k??rd?n ??ft]，基本翻譯為“封鎖；警戒線圍繞”，速記技巧為：圍起來（around）封鎖（off）。

Cordon off這個詞的英文詞源可以追溯到法語中的“cordon”和“fermer”兩個詞。“Cordon”意為“圍欄”或“警戒線”，而“fermer”意為“關閉”。因此，“cordon off”可以理解為“用圍欄等將某地封閉起來，禁止進入或通過”。

變化形式：在形式上，cordon off有過去式和過去分詞形式，分別為“cordonned”和“cordonned off”。

相關單詞：

1. cordon bleu：法語單詞，意為“優雅的圍欄”，常用于形容美食，尤其是高級餐廳中的美食。

2. cordoned：動詞cordon的過去式過去分詞形式，意為“用圍欄封閉”。

3. cordoned off：形容詞cordon的過去分詞形式加上介詞短語off構成的短語，意為“被封閉起來的”。

4. cordoning：動詞cordon的現在分詞形式，意為“正在用圍欄封閉”。

5. cordonné：形容詞cordon的形容詞形式加上后綴né，意為“有圍欄的，經過圍欄的”。

6. cordonner：動詞，意為“用圍欄圍住”。

7. cordonnet：法語單詞，意為“圍欄群”。

8. cordonnément：副詞形式，意為“有圍欄地，精心地”。

9. cordonnély：形容詞形式，意為“有圍欄地，精心地”。

10. cordoned off area：被封閉的區域。這個短語常用于描述一個被警戒線包圍起來的區域，禁止進入。

短語：

1. cordon off

2. cordoned off

3. block off

4. blocked off

5. seal off

6. sealed off

7. cordon off area

例句：

1. The area has been cordoned off for investigation.

2. The police have sealed off the crime scene.

3. The fire department blocked off the street to prevent traffic accidents.

4. The army has sealed off the area and is searching for the missing person.

5. The police have sealed off the perimeter of the crime scene and are investigating.

6. The area has been cordoned off for repairs to the damaged building.

7. We must cordon off the area while we work on the damaged road.

英文小作文：

Cordon off the dangerous area

In order to protect public safety, we must cordon off a dangerous area in our city. This area is located near a construction site and has been identified as a potential hazard due to the presence of unstable soil and potential building collapse. We must take immediate action to protect the public from any potential danger.

We will set up a perimeter around the area and ensure that no one enters or leaves the area without permission. We will also post warning signs and provide information to the public about the danger zone to ensure that they are aware of the situation and take necessary precautions. This will ensure that our city remains safe and secure for all residents and visitors.