2,000-year-old skulls reveal people in ancient Vietnam permanently blackened their teeth — a stylish practice that persists today

2000年前的头骨揭示了古代越南人染黑牙齿的习俗,这种做法一直延续至今。

livescience · livescience · 2026-02-23 · 645词 · 难度: 中等

2,000-year-old skulls reveal people in ancient Vietnam permanently blackened their teeth — a stylish practice that persists today

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