at intervals

1now and then不时地

The music came from the building at intervals.音乐声从楼里不时传来。

2happening regularly after equal periods of time or appearing at equal distance(时间、距离)间隔

The trees are planted at intervals of six feet.每隔6英尺栽一棵树。

Leaders should come to hear the masses'views at intervals.领导们应常常来听听群众的意见。


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