extensions

"extensions"的音标为[ɪkˈstensɪnz] 。"extensions"的基本翻译为"扩大，延伸；扩展物；延伸部分"。速记技巧为在记忆时可结合其发音特点，着重记忆其发音特点以及与其相关的词汇搭配等。

以下是关于“extensions”的英文词源、变化形式以及相关单词的解释和说明，希望对您有所帮助：

词源：extensions这个词源于拉丁语中的“extendere”，意为“伸展”或“扩展”。

变化形式：extensions可以有不同的形式，如单数形式的“extension”和复数形式的“extensions”。

相关单词及其解释：

1. Extensive：广泛的，大量的。这个词可以用来形容范围广、数量多的情况。

2. Extention：n. 延伸；扩展；伸展。这个词是单数形式的“extension”的拼写，可以用来表示物体向某一方向延伸的情况。

3. Extensive reading：泛读；课外阅读。这个词指的是在课余时间进行的广泛阅读，以提高阅读能力和扩大知识面。

4. Extensive knowledge：广博的知识。这个词指的是拥有广泛领域知识的状态。

5. Expand：v. 扩大；使扩张；使膨胀。这个词是“extend”的动词形式，可以用来表示物体向外扩张或扩大规模的情况。

6. Expansion：n. 扩张；扩大；膨胀。这个词可以用来表示物体向外扩张或扩大的过程。

7. Expanded：adj. 扩大的；展开的；展开状态的。这个词可以用来形容物体已经扩张或展开的状态。

8. Extension cord：延长线；延长电缆。这个词指的是用于延长电器设备电源线的工具。

9. Extension call：电话延伸服务。这个词指的是通过电话线路提供的额外服务，如传真、数据传输等。

10. Extension phone：电话分机；分机电话。这个词指的是电话系统中用于连接其他电话的分机设备。

以上这些单词都与“extensions”有着密切的联系，通过了解它们的词源、变化形式和含义，可以帮助我们更好地理解和使用这个词汇。

常用短语：

1. extension cord (延长线)

2. extension phone (电话分机)

3. extension number (分机号码)

4. extension cord extension (延长延长线)

5. extension of credit (信用延期)

6. extension of term (学期延长)

7. extension of time (延期交货)

例句：

1. I plugged in my extension phone and dialed the number.

2. The teacher gave an extension on the exam and we had more time to study.

3. We need to extend the deadline for the project by a week.

4. The company is considering extending the credit to the customer.

5. The extension cord is too short to reach the plug.

6. The extension phone is a convenient way to communicate with colleagues.

7. The extension number is printed on the back of the phone.

英文小作文：

标题：Extension Cord - A Useful Tool in Our Daily Life

Extension cords are small cables that are used to connect electronic devices to power outlets or other devices. They are a necessary tool for ensuring that electronic devices can be used without interruption and without causing damage to the power system or other devices.

In our daily lives, we use extension cords to power our computers, phones, lamps, and other electronic devices. They are also used in businesses and factories to connect equipment and machines to power sources, ensuring that they can operate efficiently and safely.

However, extension cords can also pose a safety hazard if they are not used properly or if they are damaged. Therefore, it is important to always use a quality extension cord that is rated for the specific device being used and to follow all safety guidelines when using them.

In conclusion, extension cords are a useful tool that we use in our daily lives to ensure that electronic devices can be used without interruption and without causing damage. They are also essential for businesses and factories to operate efficiently and safely.