demonstrably的音標是["dem?n?stre?b(?)l?]，基本翻譯是“明顯地，確實地”。

速記技巧：可以嘗試使用拼音速記法，將單詞拆分后進行拼音重組，即“de”（得）+“mon”（門）+“str(e)”（斯特）+“bly”（布萊）。整體來看，這個單詞是一個副詞，表示“顯然地，明顯地”。

Demonstrably是一個形容詞，意為“可以證明的，明顯的”。它的詞源可以追溯到拉丁語中的demonstrare，意為“展示，證明”。

變化形式：在詞性變化上，它可以變為名詞demonstrance，意為“證明”。

相關單詞：

1. demonstrate - 意為“展示，演示”，這個詞來自拉丁語demonstrare，表示通過展示或證明來解釋或說明。

2. demonstration - 意為“示范，演示”，這個詞來自拉丁語demonstrare，表示通過展示或證明來展示或解釋某事物的過程。

3. demonstrative - 意為“指示的，指向的”，這個詞來自拉丁語demonstrare，表示指向或指示某物。

4. demonstrator - 意為“演示者”，這個詞來自拉丁語demonstrare，表示負責展示或解釋的人。

5. demonstrably - 意為“可以證明地”，這個詞是由demonstrably演變而來，表示通過證據或證明來證明某事是真實的。

以上單詞都與demonstrably有密切關系，它們在英語中都有廣泛的用途，并被用來描述各種與證明、展示、指示和演示相關的概念。這些單詞的出現和使用都反映了英語語言的發展和演變。

至于字數要求，由于您要求列出英文詞源、變化形式以及相關單詞，并且每個單詞不少于100字，那么我將會盡可能詳細地解釋每個單詞的來源和含義。同時，我也會盡量保證每個單詞都有相關的例子和解釋。希望這個回答能夠滿足您的要求。

常用短語：

1. demonstrate one"s ability/skill

2. demonstrate one"s knowledge/understanding

3. demonstrate the importance/value of...

4. demonstrate the effectiveness/efficiency of...

5. demonstrate one"s commitment/dedication

6. demonstrate one"s reliability/trustworthiness

7. demonstrate one"s ability to handle/cope with...

雙語例句：

1. He demonstrated his ability to solve complex problems by successfully completing a challenging project.

2. She demonstrated her understanding of the subject by asking insightful questions during the lecture.

3. The company has demonstrated its commitment to environmental sustainability by investing in renewable energy sources.

4. I can confidently say that my reliability and trustworthiness have been demonstrated time and time again in my work relationships.

5. His ability to handle pressure and stress has been demonstrated in his ability to manage a demanding job effectively.

6. The teacher used visual aids to demonstrate the importance of reading comprehension in academic success.

7. The new product has demonstrated its effectiveness in improving customer satisfaction and sales revenue.

英文小作文：

Demonstrating Our Commitment to Sustainability

As a company, we are committed to sustainable practices that protect our environment and ensure a brighter future for future generations. To demonstrate this commitment, we have invested in renewable energy sources that reduce our carbon footprint and promote energy efficiency. We also encourage our employees to recycle and conserve resources, and we provide training to ensure that they understand the importance of sustainability in our business operations. By taking these steps, we aim to demonstrate our commitment to environmental stewardship and ensure that our actions align with our values and principles. We believe that by demonstrating our commitment to sustainability, we can inspire others to do the same, and together we can create a healthier and more sustainable world for all.