These products aren't habit-forming by chance.(這些產品并不是偶然形成的。)

He met a woman by chance at a party.(他碰巧在一個宴會上遇到了一名女子。)

Several years after they'd split up they met again by chance in Paris.(他們分手幾年以后在巴黎又偶然相遇。)

The site came to light only by chance.(這個地點偶然間才被發現。)

I met her by chance.(我偶然碰到她。)

An artist who was recently traveling on a ferry to the southern island discovered by chance a long lost antique vase.(一位藝術家最近乘渡船到南島時，偶然發現了一個丟失已久的古董花瓶。)

The ones that stay in place are probably by chance, and the ones that stay in the bottom are often trapped there by high fees.(那些保持住地位的很可能是偶然的，而那些一直在底位的往往被高昂的費用困在那里。)

It is not by chance that the Funeral March is not the last movement of the Eroica Symphony, but the second.(《葬禮進行曲》不是《英雄交響曲》的最后樂章，而是第二樂章，這并非偶然。)

In this house nothing is there by chance: it is always the result of great deliberation.(在這房子里，沒有什么東西是偶然的——總是非常仔細考慮后的結果。)

They found these autobiographies by chance.(他們偶然間發現了這些自傳。)