po2
  1. (bound form) grandmother
  2. (bound form) matron
  3. (bound form) mother-in-law
  4. (slang) femme (in a lesbian relationship)

Resources

Examples

在七世纪的时候,印度数学家婆罗摩笈多已经得到了方程x²-92y²=1的最小正整数解。

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