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九九- 教育百科

算術乘法,即從一到九,二數相乘之數。八十一,九的自乘數。《北史.卷七二.牛弘傳》:「通天屋高八十一尺,黃鍾九九之實也。」《文選.張衡.東京賦》:「屬車九九, ...

九九- Wiktionary

NounEdit. 九九. multiplication table; nine-nine · eighty-one; nine nines; (literary) nine nine-day periods (eighty-one days) starting from a solstice (usually the ...