A walk-a-thon is similar to a marathon, but people walk instead of running.

步行马拉松与马拉松类似，但人们以步行代替跑步。

youdao

But returned again Friday, just in time for the walk-a-thon.

周五，它又回来了，而且正赶上了这次徒步走募捐活动。

youdao

But that didn't stop a sea lion from joining schoolchildren on a walk-a-thon.

这阻止不了一只海狮和学校孩子们一起进行徒步行走募捐活动。

youdao

But we will also introduce towards the end of this semester in an effort to really make it okay to stay up all night, will be the first ever CS50 hack-a-thon.

但是，在这个学期末的时候,我们还会举办第一届CS50课程的Hackathon活动，你们可能还得熬夜才能完成它。

哈佛公开课 - 计算机科学课程节选

But some of them (say, a small church or a walk-a-thon) can't handle noncash contributions.

WSJ: Invasion of the Charity Snatchers!

It said the updates on the micro-blogging site were the first ever "tweet-a-thon" from a justice centre.

BBC: Court results put on Twitter by West Midlands Police

Williams, 34, is training for a Spar-a-thon, attempting to box over 100 rounds with the members at Wye ABC.

BBC: SPORT | Boxing | Williams to get back in the ring