You don't happen to know his name, do you?

你不会碰巧知道他的名字吧？

《牛津词典》

Did you happen to see her leave last Wednesday?

上星期三你正好碰巧看见她离开？

《柯林斯英汉双解大词典》

Did you happen to be listening?

你碰巧在听吗？

youdao

All these people happen to be playing the violin, viola,or what have you next to you.

这些人不只是碰巧在你身边，演奏小提琴或中提琴。

耶鲁公开课 - 死亡课程节选

And he's talking with Mississippi Gene. This is at the bottom of 26: There is something so indubitably reminiscent of Big Slim Hazard in Mississippi Gene's demeanor that I said, "Do you happen to have met a fellow called Big Slim Hazard somewhere?"

他在和密西西比的吉恩讲话，在26页下面：,现在，密西西比的吉恩的行为举止有些地方真切地,让我想起关于细杆的哈查德的往事，我问：“你是否在那里碰巧遇到过一个叫细杆哈查德的人“

耶鲁公开课 - 1945年后的美国小说课程节选

So just in case I happen to use the CS50 library, we've configured the cloud in such a way that make just always provides you with access to it.

所以万一我碰巧使用了CS50程序库，我们用这种方法配置了联网,那样我们就有使用它的权利了。

哈佛公开课 - 计算机科学课程节选