And that starts with a good map to mark fences, water supplies and grazing areas.

VOA: special.2010.01.19

He was a good runner, top runner, but nowhere near the 4 minutes mark.

也是一名出色的跑手，顶级跑手，但时间远高于四分钟。

哈佛公开课 - 幸福课课程节选

He was a good runner, top runner, but nowhere near the 4 minutes mark.

也是一名出色的跑手，顶级跑手，但时间远高于四分钟。

哈佛公开课 - 幸福课课程节选