名词
中文翻译：石笋
同义词：
['fossil', 'stalagmite']
例句：
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1.The cave was filled with thousands of stalactites and stalagmites.
洞穴里充满了成千上万的石笋和石柱。
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2. These stalactites are so delicate that they can easily break under your fingertips.
这些石笋如此脆弱，以至于它们可以在你的指尖轻易折断。
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3.The stalactites have formed a natural archway leading to the next chamber.
这些石笋形成了一个自然的拱门通向下一个房间。