1. A locomotive pounded dong the railway track.
   一辆机车沿铁道隆隆地前行。
2. It was not long before I tracked down the lost wallet.
   不久我就找到了遗失的钱包。
3. Please keep track of your working experience.
   请你登记你的工作经验。
4. Keep to the track the moor is very boggy around here.
   不要偏离车道－－这一带沼泽地多。
5. The jockey ran the horse up and down the track.
   骑师骑着马在跑道上来回奔跑。

　1个名词解释