I am an American, not by accident of birth but by choice.

我是美国人，不是碰巧出生在这片土地上，而是出于我自己的抉择。

youdao

The accident was caused by negligence on the part of the driver.

事故是由于司机的过失造成的。

《牛津词典》

It happened—whether by accident or design —that the two of them were left alone after all the others had gone.

碰巧—不知是偶然还是有意安排—其他人走后，只剩下了他们两个人。

《牛津词典》

The loss of the space shuttle Columbia in February of two thousand three led to an investigation by the Columbia Accident Investigation Board.

VOA: special.2009.12.30

In fact, you'll find the probability of this happening 3% is only about 3 percent, of it happening just by accident.

实际上你会发现,出现这种情况的概率是，所以说他们的实验结果完全是偶然的。

麻省理工公开课 - 计算机科学及编程导论课程节选

And in the process of tidying it up and making it prettier, I'll often by accident find the bug.

让我的程序更漂亮些,在这个清理美化代码的过程中，我常常无意中发现我的错误。

麻省理工公开课 - 计算机科学及编程导论课程节选

Like the government, we are impatient to rid Parliament's upper house of the men and women who sit in it merely by accident of birth.

ECONOMIST: Labour��s Lords reform does not go far enough

Simon Conway-Morris, a palaeontologist at Cambridge University, in England, is the champion of a new interpretation of evolution one that challenges the view that it is largely governed by the accident of circumstances.

ECONOMIST: Evolution

Of course, producers could switch to making dry white wine or even red, but by an accident of geography and climate, Sauternes is one of the few areas in which conditions are more or less perfect for the production of that distinctive rich, nutty sweetness.

WSJ: Will Lyons on Wine: The Bitter Economics of Sweet Wines