名词
中文翻译：泡沫
同义词：
['slime', 'bubbles']
例句：
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1. The foam on the surface of the milk was so thick that it could not be stirred.
牛奶表面的泡沫太厚了，无法搅拌。
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2. The foam rose and fell in the air, creating a beautiful pattern.
泡沫在空气中起伏，形成了美丽的图案。
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3. The foam was so light that it floated on the surface of the water.
泡沫非常轻，浮在水面上。