咖啡机正冒着热气,发出轻轻的咕嘟声。

The coffee machine was burbling quietly as it brewed.

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The coffee machine was burbling quietly as it brewed.

### 解释 burbling 是动词 burble 的现在分词形式,burble 的意思是"发出咕嘟声"或"冒泡声",通常用来形容液体沸腾或流动时发出的轻柔声响。

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