天空 (tiān kōng) — sky

天空 is the everyday noun for 'the sky' as a visible whole. 天 alone is broader (sky, day, or a day-classifier); 空中 and 天上 emphasize 'in the air / the heavens' rather than the sky as a single thing.

noun
sky

예문

  • 天空
    Wǒ xǐ huan lán lán de tiān kōng.
    I like the blue sky.
  • 天空
    Xiǎo niǎo zài tiān kōng lǐ fēi.
    Small birds fly in the sky.
  • 天空
    Wǎn shàng de tiān kōng néng kàn dào hěn duō xīng xing.
    At night, you can see many stars in the sky.

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