经过三天的间隔，和平谈判得以恢复。

After an ___interval of three days, the peace talks resumed.

该软件会定期检查更新。

The software checks for updates at regular ___intervals.

在交响乐的两个乐章之间，有一段短暂的寂静间隔。

There was a brief ___interval of silence between the two movements of the symphony.