无意中的英文：
by chance
unawares
unconsciously
undesignedly
unintentionally

参考例句：

One night bufflehead, while on duty, accidentally interrupted a hold up of a grocery store
一天夜里，巴福尔黑德在值勤时无意中碰上一起抢劫杂货店事件。

A queen of Thebes who unknowingly married her own son,Oedipus.
伊俄卡斯特底比斯的王后，她无意中嫁给了自己的儿子俄狄浦斯

"Sorry, I cannot help overhearing; do you mention something about the accident? "
对不起，我是无意中听到的，你刚才好像提到了那次事故，是吗

He made that mistake unconsciously.
他无意中犯了那个错误。

I cannot help overhearing...
我无意中听到你们的谈话……

I brushed up against him unintentionally.
我无意中碰了他一下。

He blundered out a secret.
他无意中泄漏了秘密。

I cannot help overhear.
我无意中听到你们的谈话。

She inadvertently telephoned the wrong person.
她无意中打错了电话.

He inadvertently hurt her feelings.
他无意中伤了她的感情。

chance是什么意思：
n. 机会；可能性；偶然，侥幸
adj. 意外的，偶然的
v. 碰巧；偶然发生；偶然发现；冒...的险

I advise you to take the chance.
我建议你抓住机会。

outside chance; remote possibility.
不大可能的机会；极小的可能性。

I'll afford you a chance.
我将给你提供一个机会。

unawares是什么意思：
adj. 不知道，未注意到的
adv. 意外地，不知不觉地

Be socially,politically,etc unaware
对社会、政治等问题不了解

He was unaware that she was such a good pianist.
他不知道她是如此好的钢琴演奏者。

Landowners unaware of the extent of their own holdings.
土地的所有人不知道他们所有的租界地的范围.

unconsciously是什么意思：
adv. 未意识到地；不知道地；失去知觉地；下意识地

He made that mistake unconsciously.
他无意中犯了那个错误。

Vacuously,smugly,and unconsciously foolish.
愚蠢的无思考力的、自以为是的、糊涂的愚蠢的

By the time ambulancemen arrived he was unconscious.
救护人员到达时他已经不省人事了。