他在多个调查中例行外勤以非正式的方式来进行协助。

He assisted in unofficial ways with the routine legwork in various investigations.

《柯林斯英汉双解大词典》

如果他们在桌子周围，邀请他们，共同决定前进的最佳方式，不论您跟他们的联系是正式还是非正式的。

If they are around the table, invite them and, jointly determine the best way forward, whether your connection with them is formal or informal.

youdao

“这种新的权益方式并没有正式教授，但是看上去住院医师无论在美国哪里受训都学习它，”他表示。

"This new, expedient way is not formally taught, but residents seem to learn it no matter where in the United States they train," he said.

youdao

And this was just a formal way of describing the best case running time and in the case of Selection Sort, what was the best case running time?

这是描述最好情况下运行时间的,一种正式的方式,在选择排序中，最理想的运行时间是多少呢？

哈佛公开课 - 计算机科学课程节选