洞穴 (dòng xué) — cave, cavern

洞穴 is a formal word for a natural underground cave or cavern. Compared with the everyday 洞, it emphasizes a larger, more geologically formed space; 巢穴 is for animal lairs or criminal hideouts, not geological caves.

noun
cavecavern
양사 ·

예문

  • 洞穴
    Tàn xiǎn jiā men zǒu jìn le zhè ge shén mì de dòng xué.
    The explorers walked into this mysterious cave.
  • 洞穴
    dòng xué Lǐ miàn fēi cháng cháo shī, ér qiě hěn hēi.
    Inside the cave it's very damp and also very dark.
  • 洞穴
    Zhè ge dòng xué shì jǐ bǎi wàn nián qián xíng chéng de.
    This cave was formed millions of years ago.

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