over-,在上，超过，run,跑。引申词义赶上，超过。

1. Padua and Vicenza are prosperous, well-preserved cities, not overrun by tourists.

帕多瓦和维琴察两市商业繁荣，建筑古迹保存良好，也没有蜂拥而至的游客。

2. The flower beds were overrun with grasses.

花坛里杂草横生。

3. The Roman Empire was overrun by Nordic barbarians.

罗马帝国被日耳曼的野蛮人推翻了。

4. The stores were overrun with rats and mice.

仓库里到处都是大大小小的老鼠。

5. The house was completely overrun with mice.

这房子简直成了老鼠的天下。