这要花大约三周时间，出入不过一天左右。

It'll take about three weeks, give or take a day or so.

《牛津词典》

这种想法出现于公元1800年左右，当时人口变得足够多，大约有10亿人，人类的活动开始能够改变环境。

The idea is that around the year 1800 CE the human population became large enough, around a billion people, that its activities started altering the environment.

youdao

在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。

At about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.

youdao

Now, the Euro is up to a dollar 50 roughly.

目前，欧元对美元大约在1：1。5左右。

斯坦福公开课 - 经济学课程节选

If you're talking about the year 750 or something like that it's-- I think it's in the hands, well, it is in the hands of the Assyrians and it will ultimately fall into the hands of the Persians.

如果是说大约公元前750年左右,我想它先是,落入古亚述人之手,最后又被波斯所占领

耶鲁公开课 - 古希腊历史简介课程节选