And for reference, incidentally, in case you ever forget what the point of some exercise was, I'll almost always comment the code up top with a quick sentence or two that reminds you what this program does.

顺便作为参考，为了避免我们可能忘记一些代码的意思，我通常会用一两个简单的句子,在上面作出注释,那样会提醒我们这个程序是干嘛的。

哈佛公开课 - 计算机科学课程节选

Mr Armitage manages to steer deftly through all this complexity, and, almost incidentally, gives his version great life, feeling and energy.

ECONOMIST: Homer

And the House of Lords, incidentally, will almost certainly acquire members deputed from Scotland and Wales.

ECONOMIST: Sunshine and showers