The trailing I after the regex statement (which in this case is simply the phrase walmart) signifies that the statement is not case sensitive.

regex语句(本例中为walmart)后面的i表明该语句不区分大小写。

youdao

I caught up with a nitrate train, chugging along, its open wagons trailing a gauze of white mist.

有一列拉硝酸钠矿石的火车隆隆前行，敞开的车厢上吹起一阵白雾。

youdao

Now I, or someone else might forget the leading or trailing slash and some Windows user might use back slashes instead of regular slashes, so I decided to just handle that in the script.

现在，我(或者别的什么人)可能忘记了前导斜杠或末尾斜杠，而一些Windows用户可能使用反斜杠而不是正斜杠，因此我决定在脚本中对此进行处理。

youdao

But I was invited to come, and I would say as a trailing spouse to become, to work as a counselor on the campus of Earlham College, which is a small, really wonderful and far reaching, -Wonderful, wonderful college.

而我是应邀前往，或者说,是当了个跟班的，做了顾问,留在了厄勒姆学院，这是一所规模不大，但非常优秀,影响广泛，-很棒，很棒的学校。

普林斯顿公开课 - 人性课程节选

If we talk about support levels real quick, I think with these indicators proving to be less reliable in turbulent markets, I personally have relied heavily on using trailing stop-loss orders, as I mentioned, as well as indicators like volume, price performance, and support levels.

FORBES: 10 Small Caps Flashing Buy Signs

The two ropes I was trailing added even more weight to every move.

WSJ: Training for the Big Wall | By Michael J. Ybarra

It's cheaper than its peers at 8.1 times trailing earnings and 4 times what I think it should earn in 2013.

FORBES: Magazine Article