名词
中文翻译：Unknown
同义词：
['stalactite', 'stalagmite', 'stalactite-like structure']
例句：
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1. The stalactite in the cave is a marvel of nature.
洞穴中的石笋是大自然的奇迹。
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2. The stalagmite has been formed over millions of years.
石笋已经形成数百万年了。
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3. The stalactite-like structure in the cave is unique and fascinating.
洞穴中的石笋状结构独特且迷人。