孩子们不停地缠着他们的母亲要冰淇淋。

The children pestered their mother ___relentlessly for ice cream.

在故事中，英雄被他的敌人无情地追赶。

The hero is ___relentlessly pursued by his foes in the story.

她每天不停地练习钢琴，以掌握这首曲子。

She practices the piano ___relentlessly every day to master the piece.