by accident的音標是["ba? ?d??"sent]。基本翻譯是“偶然地，意外地”。速記技巧可以是：by（介詞）+ accident（名詞）= by accident（偶然）。

By accident這個詞的詞源可以追溯到拉丁語詞組in accidens，意思是“偶然發生的事情”。這個詞組由兩部分組成，in表示“在……中”，accidens意為“發生的事情”。

變化形式：By accident可以變為byaccident或者accidentally，表示“偶然地”或者“意外地”。

相關單詞：

1. accidental - 形容詞，表示“偶然的”或“意外的”。例如：“He made a accidental discovery that changed the course of scientific research.”（他偶然發現了一個改變科學研究進程的事情。）

2. accident - 名詞，表示“事故”或“意外事件”。例如：“A car accident occurred when a driver fell asleep at the wheel.”（一位駕駛員在開車時睡著了，發生了車禍。）

3. accidentally - 副詞，表示“偶然地”或“意外地”。例如：“Accidentally, I found the lost keys while walking my dog.”（意外地，我在遛狗的時候找到了丟失的鑰匙。）

4. accidently - 副詞，與accidentally同義，表示“偶然地”或“意外地”。例如：“He accidently knocked over a vase while trying to open a door.”（他試圖打開一扇門時，不慎打翻了花瓶。）

5. incident - 名詞，與accident有相似的含義，表示“事件”或“事故”。例如：“A tragic incident occurred when a young woman was hit by a car while crossing the street.”（一位年輕女子過馬路時被車撞了，發生了一起悲劇性的事件。）

6. occurrence - 名詞，表示“發生的事情”或“出現的情況”。例如：“The occurrence of a natural disaster is unpredictable.”（自然災害的發生是無法預測的。）

7. incidentally - 副詞，表示“順便提一下”或“附帶說一下”。例如：“Incidentally, I have some news about my job.”（順便說一下，我有些關于工作的消息。）

8. accidentality - 名詞，表示“偶然性”或“意外性”。例如：“The accidentality of events determines their likelihood of occurrence.”（事件的偶然性決定了它們發生的可能性。）

9. accidentalism - 名詞，表示“偶然論”或“意外論”。例如：“The accidentalism of science is a theory that explains events as the result of chance occurrences rather than predetermined outcomes.”（科學的偶然論是一種理論，它解釋事件是偶然發生的結果而不是預定的結果。）

10. accident-prone - 形容詞，表示“容易發生事故的”或“易出意外的”。例如：“This new technology is accident-prone and requires careful handling.”（這項新技術容易發生事故，需要小心處理。）

常用短語：by accident，無心之失；by chance，偶然；by mistake，錯誤地；by turns，輪流；inadvertently，無意中；unintentionally，無意地；accidentally，意外地。

例句：

1. I hit my toe by accident when I was stepping over a log.

2. We accidentally left our keys in the car.

3. She spoke by turns, addressing each of us in turn.

4. He inadvertently dropped the glass while trying to pick up a pen.

5. I unintentionally spilled the milk when I was rushing to work.

6. Accidents happen, but we can reduce the risk by being careful.

7. We accidentally found ourselves on the wrong train and had to change at the next stop.

英文小作文：

標題：Accident on the Road

One day, I was driving along a familiar road when suddenly, an unexpected obstacle appeared in front of me. It was a fallen tree branch from a recent storm, and it caused me to swerve sharply to avoid it. Fortunately, I managed to avoid hitting anything else, but it was a close call.

This experience taught me an important lesson about being careful on the road. Accidents can happen at any time, and it"s always best to be prepared for the unexpected. I also realized that it"s important to be aware of your surroundings and to be cautious when driving, especially on roads that are prone to sudden changes in conditions like this one.