gainless的音標是[?ɡe?nl?s]，基本翻譯是“無益的，無效果的”，速記技巧是“gain（收益）＋less（少的，沒有的）＝無益的”。

"Gainless" 這個詞的英文詞源可以追溯到拉丁語 "gratus" 和 "in" 構成的復合詞 "gratuitous"，意為免費的，無償的。它的變化形式包括 "gainless"（無所得的）和 "gratuitous"（無償的，免費的）。

相關單詞：

1. "Gratitude"（感激）：這個詞源于 "gratuitous" 和 "itude" 詞尾，意為感激之情。

2. "Gratification"（滿足）：這個詞由 "gratify"（使滿足）派生而來，表示滿足感。

3. "Gratuitousness"（無償性）：這個詞由 "gratuitous" 派生而來，表示無償性。

4. "Gratification"（獎勵）：這個詞可以指給予的獎勵或滿足感。

5. "Gratification point"（滿足點）：這個詞用于描述在追求某個目標的過程中，當達到某個特定點時，人們感到滿足或快樂。

6. "Gratuitous gift"（無償贈品）：這個詞用于描述無需支付任何費用的禮物。

7. "Gratuitousness of love"（愛的無償性）：這個詞用于描述愛的無私和無償的性質。

8. "Gratuitousness of labor"（勞動的無償性）：這個詞用于描述勞動的無償性質，通常指雇主不支付員工應得的工資。

9. "Gratuitousness of wealth"（財富的無償性）：這個詞用于描述財富的分配方式，其中一些人獲得財富無需付出代價或承擔責任。

10. "Gratuitousness of life"（生命的無償性）：這個詞用于描述生命的本質是無償的，我們來到這個世界時沒有任何代價或責任。

以上這些單詞都與 "Gainless" 這個詞有密切的聯系，它們都反映了人類社會中的一些基本價值觀和行為方式。

常用短語：

1. gain knowledge

2. gain weight

3. gain popularity

4. gain strength

5. gain momentum

6. gain access

7. gain favor

雙語例句：

1. I gained weight after I started working out regularly.

2. She gained popularity after appearing on the TV talent show.

3. The company gained strength after investing in new technology.

4. The team gained momentum after making a comeback in the game.

5. I gained access to the restricted area after showing my ID card.

6. His efforts gained him favor with the boss.

7. The government"s policies are aimed at gaining support from the people.

英文小作文：

標題：Gaining Success: The Key to Successful Living

Success is a complex concept that can be difficult to define, but it is essential to our pursuit of happiness and fulfillment in life. Gaining success is not solely dependent on external factors such as wealth or status, but rather on our ability to work hard, persevere, and maintain a positive mindset.

Success is not a destination, but a journey that requires continuous effort and dedication. It is a process of gaining momentum, gaining access to opportunities, gaining favor from others, and gaining knowledge that leads us to our goals and dreams. Through this process, we can gain strength, confidence, and a sense of accomplishment that brings fulfillment and happiness to our lives.

Gaining success is not solely the domain of the privileged few, but it is within the reach of anyone who is willing to work hard, persevere, and maintain a positive mindset. Success is not solely about what we have or where we are, but about who we are and what we are becoming. By embracing this truth, we can unlock the potential within ourselves and create a life of our own design.