孩子们在操场上疯狂地跑来跑去。

The children were running madly around the playground.

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The children were running madly around the playground.

madly 是形容词 mad(疯狂的)加上副词后缀 -ly 构成的副词,表示"疯狂地、极度兴奋地",用来修饰动词 running 表示奔跑的状态。

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