第四纪

dì sì jì

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Definitions

1. fourth period
2. quaternary (geological period covering the recent ice ages over the last 180,000 years)

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Child Words of 第四纪

• 四 四 sì: four
• 第 第 dì: (prefix indicating ordinal number, as in 第六[dì liù] \sixth\)
• 纪 纪 jì: order