extender的音標為[?k?stend?(r)]，基本翻譯為“擴大器；延伸者；增加者”，速記技巧為“ext 延伸+ end+ er→延伸者”。

Extender這個詞的詞源可以追溯到拉丁語詞根"extendere"，意為“伸展”或“擴展”。它的變化形式包括過去式"extended"，過去分詞"extended"，現在分詞"extending"以及形容詞"extensive"。

相關單詞：

1. Extensive - 形容詞，意為“廣闊的，廣泛的”，可以用來形容面積、范圍、知識等方面的廣泛。

2. Extension - 名詞，意為“延長，擴展”，可以指空間上的延伸，也可以指時間上的延期。

3. Extend - 動詞，意為“延長，延伸”，可以指物體在空間上的延伸，也可以指在時間上的延續。

4. Expansion - 名詞，意為“擴張，擴大”，可以指物體在空間上的擴大，也可以指范圍、規模等方面的擴大。

5. Extendible - 形容詞，意為“可延伸的”，可以用來形容物體可以向外延伸的性質。

以上這些單詞在英語中都與extender這個詞有著密切的聯系，并且可以用來描述不同方面的擴展和延伸。這些單詞的出現和使用也反映了人類對于空間、時間和知識等方面的不斷探索和追求。

Extender:

常用短語：

1. Extend the deadline 延長期限

2. Extend the scope 擴大范圍

3. Extend the network 擴大網絡

4. Extend the reach 擴大影響力

5. Extend the reach of knowledge 擴大知識的傳播范圍

6. Extend the cooperation 擴大合作

7. Extend the scope of research 擴大研究范圍

雙語例句：

1. We need to extend the deadline for the project to ensure that all tasks are completed on time.

2. The company has extended the scope of its business operations to include new products and services.

3. The network has been extended to cover more remote areas, providing better access to information and communication services.

4. The organization is committed to extending the reach of its education programs to underprivileged communities.

5. Knowledge is constantly being extended through research and innovation, leading to new discoveries and advancements in various fields.

6. We need to extend our cooperation with other countries to address global challenges together.

7. The scope of the research has been extended to include a broader range of topics related to the field of medicine.

英文小作文：

The Extender: A Tool for Expanding Possibilities

The extender is a tool that can be used to expand and enhance various aspects of life, including time, scope, network, reach, knowledge, cooperation, and research scope. It can be used to extend deadlines, expand business operations, cover remote areas with better information and communication services, extend the reach of education programs to underprivileged communities, expand research topics, and much more.

The extender is a versatile tool that can be used in various ways to achieve various goals. It can be used to push boundaries and explore new possibilities, making life more exciting and fulfilling. It is a tool that can help us achieve our goals and dreams by providing us with more opportunities and resources. Therefore, it is essential to use the extender wisely and creatively to make the most of its potential.