mushroom 蘑菇是可数名词吗?

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mushroom为不可数名词
蘑菇；菌类快速成长和发展的事物
（枪击事件中）无辜中弹的旁观者词性变化vi.
呈蘑菇状扩散
The smoke mushroomed into the sky.
烟呈蘑菇状扩散到天空中.
迅速成长New houses have mushroomed on the edge of the town.
城市边缘的新建房屋犹如雨后春笋.
采蕈；采菇go mushrooming采蘑菇去习惯用语spring [grow,shoot] up like mushrooms雨后春笋般地涌现