it is believed that the average lifespan of the chambered nautilus is about 20 years.
→ the average lifespan of the chambered nautilus is believed to be about 20 years.
검은색에서 어떻게 파랑색이 되는지, 파랑색에서 어떻게 검은색이 되는지 이해가 안되요..
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2022-06-20 17:45:09