The fishermen know the approximate time of year when they will be allowed to fish, but on any given day, one or more field biologists in a particular area can put a halt to fishing.

渔民们知道一年中允许捕捞的大概时间段，但是在某些日子，一个地区可能有一个或多个实地生物学家中止捕鱼活动。

The approximate time is two o 'clock.

大概的时间是2点钟。

The approximate time is three o'clock.

现在大概是三点钟。

It even shows you dates and approximate time stamps.

上面甚至还有日期和大概的时间标记。

Give an approximate time frame for the project in the timing section.

在时机部分为项目设定一个大致时间。