名词
中文翻译：石笋
同义词：
['stalactite', 'stalagmite例句：1. The stalactites and stalagmites are a natural wonder in the cave.（洞穴中的石笋和石笋是大自然的奇观。）']
例句：
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1. The stalactites and stalagmites are a natural wonder in the cave.
洞穴中的石笋和石笋是大自然的奇观。
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2.The stalactites and stalagmites have been formed over millions of years.
石笋和石笋已经形成数百万年了。
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3. The stalactites and stalagmites are used in scientific research to study the formation of minerals.
石笋和石笋在科学研究中被用来研究矿物的形成。