fails的音標為[fe?lz]，基本翻譯為“失敗；未滿足；衰退；缺乏”，速記技巧為“fail的輔音音素/f/，/e?/，/z/，可以聯想單詞fail失敗”。

Fails的英文詞源是拉丁語“failere”，意為“失敗”。

Fails的變化形式有：Fails（失敗），Failed（失敗的），Failure（失敗），Failedly（失敗地），Failure point（失敗點），Failure rate（失敗率）。

與fails相關的單詞有：fail（失敗），fail to（未能），fail in（在…上失敗），fail on（在…上失敗），fail of（未能獲得），fail to exist（不存在）。

Fails在英語中是一個常用的詞根，表示失敗的意思。它經常出現在與失敗相關的短語和成語中，如“fail a test”，“fail to complete the task”等。同時，它也經常出現在與學習、教育相關的詞匯中，如“failure in learning”，“failed exam”等。這些單詞和短語在英語中非常常見，反映了英語詞匯的多樣性和豐富性。

以上內容僅供參考，建議到相關網站查詢以獲取更多信息。

常用短語：

1. fail to do sth

2. fail in/out of sth

3. fail to achieve/reach sth

4. fail to meet expectations

5. fail to complete sth

6. fail to understand sth

7. fail to keep one"s promise

雙語例句：

1. He failed to complete the task on time. (他沒能按時完成任務。)

2. The exam failed me in my career. (考試沒考好，影響了我的職業發展。)

3. The project failed to meet the expectations of the investors. (項目未能滿足投資者的期望。)

4. I failed to understand the complex problem. (我未能理解這個復雜的問題。)

5. He failed to keep his promise to help me. (他沒有履行幫助我的承諾。)

6. The company failed out of bankruptcy. (公司因破產而倒閉。)

7. She failed in love and decided to focus on her career. (她失戀后決定專注于事業。)

英文小作文：

Failure is a part of life， and it can be a valuable experience. Although failure can be painful and discouraging， it can also teach us valuable lessons and help us grow stronger.

When we fail， we may feel disappointed and lost， but we should remember that failure is not the end of the world. Instead， we should learn from our mistakes and use them as stepping stones to success. We should never give up， even when faced with challenges and difficulties. Instead， we should keep pushing forward and try our best to achieve our goals.

Failure can also be a catalyst for change and innovation. When we encounter failure， we may be forced to think outside the box and come up with new ideas and solutions. This can lead to breakthroughs and improvements in our work and personal lives.

Finally， failure can teach us valuable life lessons about perseverance, resilience, and overcoming obstacles. These are valuable qualities that we can use throughout our lives to achieve success and happiness. Therefore, even when faced with failure, we should remain optimistic, resilient, and determined to succeed.