by chance的音標是[ba? chɑ?ns]，基本翻譯是“偶然；碰巧”，速記技巧是：by+adj（偶然）+v（動詞）。

By chance這個詞的英文詞源可以追溯到拉丁語“per fortuna”或“fortuinarius”，意為“偶然，運氣”。這個詞在英語中演變出了“by chance”這個短語，表示“偶然地，碰巧”。

變化形式：在英語中，by chance沒有明顯的變化形式。

相關單詞：

1. chance - 名詞和動詞形式，表示機會，可能性；也用作俚語，表示運氣。

2. fortuitous - 形容詞，意為“偶然的，意外的”。

3. accidental - 形容詞，表示“偶然的，意外的，非故意的”。

4. happen - 動詞，表示“發生，出現”，有時也用作短語“happen to (v.)”，表示“碰巧”。

5. contingency - 名詞，表示“可能性，意外事件”。

6. random - 形容詞和名詞，表示“隨機的，任意”。

7. improbability - 名詞，表示“不可能性”。

8. fortunate - 形容詞，表示“幸運的，有利的”。

9. luck - 名詞和形容詞，表示“運氣，好運”。

10. chance encounter - 名詞短語，表示“偶然的相遇”。

這些單詞都與by chance這個詞源相關，描述了不同情況下偶然發生的事情。它們強調了機會、運氣、意外和概率等因素在生活中的應用。

常用短語：

1. by chance 偶然

2. hit the jackpot 中大獎

3. stumble upon 偶然發現

4. chance encounter 偶然相遇

5. chance meeting 偶然的邂逅

6. chance it 碰碰運氣

7. take a chance 冒險一試

例句：

1. I stumbled upon a great book by chance in the library.

2. I hit the jackpot by buying a lottery ticket by chance.

3. We had a chance encounter at the party and found we had a lot in common.

4. I had a chance meeting with my old friend on the street today.

5. I took a chance and applied for a job I was interested in even though I didn"t have much experience.

6. We should seize every opportunity and take a chance on new experiences.

7. It"s better to take a chance than to regret not trying.

英文小作文：

Chance plays a significant role in our lives. Sometimes we stumble upon something wonderful by chance, and other times we miss out on opportunities because we"re too afraid to take a chance. However, I believe that taking a chance is always worth it, because it can lead to unexpected rewards and experiences that we would never get otherwise.

In my opinion, we should seize every opportunity that comes our way, even if it"s something that seems risky or unfamiliar. We should never be afraid to try something new or go after what we want because it might be a chance that we won"t get again in our lifetime. By taking a chance, we can discover new things, make new friends, and learn new skills that can help us grow as individuals and as members of society.

Therefore, I encourage everyone to take a chance every now and then, even if it"s something small like trying a new restaurant or going on a spontaneous trip. It might be the best decision you ever make!