"attained"的音標為[??te?nd]，基本翻譯為"獲得，達到；達到的，獲取的"。速記技巧可以考慮將其分解為"a-t-t-r-a-i-n"進行記憶，其中"a"代表一個單詞的開頭，"t"代表時間，"tribute"中的"ribute"可以表示付出努力，而"i-n"則代表最終獲得的結果。這樣可以將單詞分解為幾個部分進行記憶，提高記憶效率。

"Attain"這個詞的詞源可以追溯到拉丁語"ad-tainere"，意為“抓住，獲得”。它的變化形式包括過去式"attained"，現在分詞"attaining"，以及形容詞"attainable"。

相關單詞：

1. "Achievement"：這個詞是由"achieve"和"ment"組成的名詞形式，表示“成就，完成”。這個詞與"attain"有相似的含義，都表示獲得成功或達到目標。

2. "Attainment"：這個詞是由"attain"和"ment"組成的名詞形式，表示“成就，達到”。它通常用于描述一個人或團體在某個領域中的成就。

3. "Attainable"：這個詞表示“可以達到的，可獲得的”。它通常用于描述一個目標或期望，如果努力可以達到的話。

以上這些單詞都與"Attain"這個詞有密切的聯系，都表示獲得成功或達到目標的意思。它們在英語中廣泛使用，并被用來描述各種情況下的成就和達到。

至于變化形式和相關單詞的數量，這主要取決于具體的語境和用法。在一般情況下，"Attainable"是一個比較常用的單詞，而"Achievement"、"Attainment"等詞則更多地用在特定的語境中。總的來說，這些單詞在英語中都是非常常用的詞匯，對于表達各種意思和語境都有很大的幫助。

至于字數限制，我盡量在100字以內解釋了這些單詞的詞源和主要含義，并舉了一些相關的例子。如果需要更多的信息或解釋，歡迎提出。

常用短語：

1. attain success

2. attain one"s goal

3. attain knowledge

4. attain power

5. attain wealth

6. attain fame

7. attain one"s dreams

例句：

1. After years of hard work, he finally attained success in his career.

2. She attained her goal of becoming a doctor, and now she is happy and fulfilled.

3. Only through continuous learning and effort can we attain knowledge of the world.

4. He attained power by cunning and deceit, but in the end, he paid the price for his actions.

5. Success in business requires the ability to attain wealth, and this requires hard work and perseverance.

6. She attained fame for her outstanding performance in the film, and now she is enjoying the fruits of her labor.

7. After years of dreaming, he finally attained his dream of becoming a professional artist.

英文小作文：

Success is a journey that requires hard work, dedication, and perseverance. It is a reward that is well worth achieving, but it is not easy to attain. Success brings happiness and fulfillment, but it also brings challenges and difficulties that must be overcome. However, with the right attitude and effort, success can be achieved. It requires setting goals, working hard, learning from mistakes, and never giving up. Success is not just about achieving a goal or attaining wealth or fame, but about living a fulfilling life and making a positive impact on others. Therefore, we should always strive to attain success in our lives, no matter what our goals may be.