边防部队保护国家安全。

The frontier defence forces protect national security.

边防士兵在寒冷的夜晚巡逻。

The soldiers of frontier defence patrol on cold nights.

边防检查站设在边境线上。

The frontier defence checkpoint is set up at the border line.

边防人员每天都要检查过往车辆。

The frontier defence personnel check passing vehicles every day.

边防工作非常重要，不能掉以轻心。

The work of frontier defence is very important and cannot be taken lightly.