"in default of"的音標為[?n d??f??t v??]。

該詞在句子中通常作為名詞短語使用，表示在缺乏某種東西的情況下。其基本翻譯為“在……缺席；在……沒有的情況下”。

關于速記技巧，可以嘗試以下方法：

1. 形象記憶：將“default”與“defend”（防守）聯系起來，想象一個人在防守時沒有達到預期的效果，即為“in default of”。

2. 詞根詞綴記憶：如果對英語有一定了解，可以通過“default”的詞根-ity和前綴“in-”的組合來記憶。

請注意，以上方法僅供參考，具體記憶方法應根據個人英語詞匯基礎和實際情況選擇。

“in default of”這個短語的英文詞源是“in”加上“default”，意為“在…情況下未能履行”。它的變化形式主要有兩種：一是“default”本身可以作為名詞，意為“違約、缺席”，也可以作為動詞，意為“不履行”；二是“in default of”可以作為短語，表示“在…未能履行的情況下”。

相關單詞：

“defeat”意為“擊敗、戰勝”，其詞源和“default”有相似之處，都含有“失敗”的意思。

“failure”意為“失敗、失敗者”，可以與“default”構成近義詞。

“remedy”意為“補救、治療”，與“default”有相似之處，都表示某種問題或缺陷。

“defaulting”意為“違約的、缺席的”，是“default”的現在分詞形式，可以作為名詞或形容詞使用。

“non-default”意為“不違約”，是“default”的反義詞，可以與“default-free”等詞一起使用。

例如，“In the absence of a solution, we may have to accept the default of a new tax.”（在沒有解決方案的情況下，我們可能不得不接受新的稅收的默認方案。）

以上就是對“in default of”這個短語的英文詞源、變化形式以及相關單詞的解釋和舉例。希望對你有所幫助。

常用短語：

1. in default of... 在缺乏...的情況下

2. comply with... 遵守...

3. take into account... 考慮到...

4. bear in mind... 記住...

5. make a distinction between... 把...加以區分

6. be subject to... 受...制約

7. take into consideration... 考慮到...

例句：

1. If we cannot reach an agreement on the budget, we will have to default on our obligations to the taxpayers.

2. We must comply with all safety regulations to avoid accidents.

3. Please take into account our limited resources when making decisions.

4. We must bear in mind our responsibilities to society.

5. When making decisions about policies, we should make a distinction between short-term and long-term effects.

6. All decisions should be subject to review and approval by higher authorities.

7. We must take into consideration the feelings of others when dealing with conflicts.

英文小作文：

When it comes to making decisions, we often have to default on some obligations or commitments because of various reasons. For example, if we cannot reach an agreement on a budget, we may have to delay payment or miss deadlines for important projects. However, this does not mean that we should avoid responsibility or compromise our principles. Instead, we should comply with our obligations while taking into account the consequences of our decisions and the impact on others. We should also bear in mind that our decisions may have long-term effects on ourselves and others, and we should make a distinction between short-term and long-term considerations when making decisions. Finally, we should always take into account the feelings of others and strive to reach a fair and equitable solution that is acceptable to all parties involved.