What is the fourth suggestion probably about?

第四个建议可能是关于什么的呢？

youdao

First, came the invention of writing, probably about 5500 years ago.

首先，文字大概发明于5500年前。

youdao

Probably about five.

大概五分钟吧。

youdao

"And the box was open and there were probably about five or six of these little round, yummy-smelling warm doughnuts in there.

VOA: special.2010.04.12

All right? And I'm going to say-- sort of set that stage here, so that-- It turns out that that's probably about the best we can do, or again ends at the length of the list.

我要说的是，这一阶段的集合,我们用最优的方法完成,还是取决于列表的长度，好的，还是回到了我的问题上了。

麻省理工公开课 - 计算机科学及编程导论课程节选

That's down... probably about 50 blocks or so, 40 blocks. I'm going to walk down there. So I just like to walk.

动物园在离这里四五十个街区远的地方。我要走过去。我只是喜欢散步。

在中央公园溜达 - SpeakingMax英语口语达人

I'm probably about as neutral as anyone can be on the issue of gun control.

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"We've appreciated the significance of breast density for probably about 30 years, " Kerlikowske says.

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There are probably about 440 or so companies worldwide, many of them like these, blue chips...

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