Someone likened his voice to the croaking of a bull-frog.

有人把他的声音比作牛蛙的叫声。

youdao

On a sudden, she heard a fluttering and croaking in the air, and the dwarf said, "Here come my masters."

突然，她听到空中传来拍翅膀声和呱呱的叫声，小矮人说：“我的主人们来了。”

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On the way he passed by a marsh, in which a number of frogs were sitting croaking.

在路上，他经过一片沼泽地，那里有许多青蛙坐在那里呱呱叫。

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Suddenly,he put his hand into the water and rubbed two of his fingers together, making a strange sound, exactly like the sound of a croaking frog.

VOA: special.2011.02.19

With such diverse sound effects and samples as frogs croaking, children playing, side walk preachers preaching, and a New York subway door closing, The Education of the Individual Soul is tied to both nature and to everyday urban life, giving it the qualities of a sort of ethereal and mystical modern-day fairytale.

NPR: East Forest: 'Pacific Coast Highway'