1. The jockey ran the horse up and down the track.
   骑师骑着马在跑道上来回奔跑。
2. The mountaineers ran into a snowstorm halfway down.
   登山运动员又在半路上遇上了暴风雪。
3. She always runs up/down the stairs.
   她总是跑着上[下]楼梯.
4. The farm labour force is running down steadily.
   农场里的劳动力在不断减少。
5. I'm running down the records of the past ten years.
   我正在调查过去十年的记录。

　7个动词解释