大约

大约

Approximately; about.

Here, '大约' indicates an approximation or estimation regarding the amount of time needed.

我们大约需要两小时完成这个任务。

We will need approximately two hours to complete this task.

Here, '大约' is used to give an estimated number related to audience size.

这次演讲听众大约有五百人。

There are approximately 500 people attending this lecture.

In this usage, '大约' gives an estimated point in time when the action began.

大约在两年前，我开始学习中文。

Approximately two years ago, I started learning Chinese.