extendable的音標為：[?k?stend?bl] ，意思是可延展的。

速記技巧：可以結合單詞的發音來記憶，e發音為/i?/，單詞結尾的d可以聯想到“得”，extend意為擴展，因此可以聯想到可延展的。

"extendable"這個詞的詞源可以追溯到拉丁語"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"和形容詞"extendable"。

相關單詞：

1. extension - 擴展，延伸，伸展；擴大；延期

2. extend - 伸展，擴展；延伸，延伸范圍

3. extendible - 可擴展的，可伸展的

4. extendingly - 擴展地，延伸地

5. extensible - 可伸展的，可擴展的

6. extensiveness - 擴展性，伸展性

7. extending - 擴展，延伸；擴大范圍

8. extensio - 擴展，伸展

9. ex-tension - 前綴"ex-"加上"extension"，表示"超出"或"向外"

10. extendingly - 是一個副詞詞組，表示方式或狀態，通常用于描述動作或過程如何進行或完成。

在英語中，"extendable"這個詞通常用于描述可伸縮或可擴展的物體或技術，如可伸縮的表格、可擴展的數據庫等。這個詞組的使用在許多領域都很常見，包括計算機科學、工程和建筑等。

常用短語：

1. extend a helping hand

2. extend one"s gratitude

3. extend one"s invitation

4. extend one"s support

5. extend one"s sympathy

6. extend one"s invitation to dinner

7. extend one"s hand in friendship

例句：

1. I extended my invitation to attend the party to all my friends.

2. She extended her gratitude to the people who helped her in her time of need.

3. The company has extended its support to the local community by sponsoring a number of charitable events.

4. He extended his hand in friendship to the newcomer, hoping to build bridges of understanding.

5. I hope to extend my sympathy to you during this difficult time.

6. Please accept my apologies for the delay in extending payment.

7. The teacher extended the class an extra 15 minutes to allow for extra practice.

英文小作文：

標題：The Importance of Extending a Hand in Friendship

Friendship is a beautiful and powerful force that can bring comfort and support during difficult times. It is essential to extend a hand in friendship to those who need it, whether it be a helping hand, a listening ear, or a kind word of encouragement. By doing so, we not only build bridges of understanding and empathy, but also strengthen our own sense of connection and belonging.

In today"s fast-paced world, it is easy to become isolated and disconnected from others. However, by extending a hand in friendship, we can break down barriers and create bridges of understanding and support that bring us closer together. It is a simple act that can have a profound impact on those around us, and it is an act that we should always remember to do.