黎明时分，坦克驶入了城市。

___Tanks rolled into the city at dawn.

他们当时在大学里，正在通过无线电频率传输，这时坦克从主入口入侵了。

They were inside the university transmitting on a radio frequency when the ___tanks invaded from the main entrance.

军队部署了几辆坦克来保卫边境。

The army deployed several ___tanks to secure the border.