by the age of音標為：[ba? ?e? z ??(r) ?l ?z] ，基本翻譯為“到……年齡時”，速記技巧為：by the=比他/她；age年齡；of=哦/啦。

by the age of 的英文詞源為by+the+age+of+somebody/something，表示在某人/某物一定的年齡時。

變化形式：復數形式為 by the ages of，比較級為 older或younger，最高級為 oldest或youngest。

相關單詞：

1. by the age of 10 在十歲的時候

2. by the age of 20 在二十歲的時候

3. by the age of 30 在三十歲的時候

4. by the age of 40 在四十歲的時候

5. by the age of 50 在五十歲的時候

6. the age of reason 判斷力的時候

7. the age of enlightenment 啟蒙時期

8. the age of austerity 艱苦時期

9. the age of social media社交媒體時代

10. the age of information 信息時代

在以上單詞中，by the age of 10表示在十歲的時候是一個重要的時間點，是人們開始形成獨立判斷和行為能力的時候。而隨著年齡的增長，人們會經歷不同的歷史時期和社會背景，這些單詞反映了這些變化。同時，這些單詞也體現了英語詞匯的豐富性和多樣性。

常用短語：

1. by the age of 18

2. by the age of 25

3. by the age of 30

4. by the time one is 40

5. at the age of 60

6. at the age of 70+

7. at the age of retirement

例句：

1. I started driving by the age of 18 and have never looked back.

2. She graduated from high school by the age of 17 and went on to college.

3. By the age of 35, she had achieved everything she had ever dreamed of.

4. At the age of 60, he retired from work and started a new chapter in his life.

5. At the age of 75, he still enjoys going out for walks and meeting new people.

6. At the age of retirement, she decided to travel the world and explore new cultures.

7. He has been working for the company for over 30 years and is still going strong at the age of 50.

英文小作文：

I remember when I was young, I always dreamed of being able to drive when I turned 18. It seemed like such a big milestone at that time, and now that I am there, I realize how much I have grown and changed over the years. I remember my first time behind the wheel, it was a bit scary at first, but once I got used to it, it felt great to be able to take control of my own transportation and go wherever I wanted to go.

Now that I am approaching the age of retirement, I am realizing how much time has passed and how much life has changed since I was young. I am looking forward to a new chapter in my life where I can slow down, relax, and enjoy the simple things in life like spending time with family and friends, traveling, and just being present in each moment. I am also looking forward to being able to help others in my later years and make a difference in someone else"s life. It is an exciting time to be living in this world and I am looking forward to what the future holds for me and my family.