在线词典数九寒天数九:从冬至起,每九天为一“九”,三九、四九最寒冷。最寒冷的那些日子。拼音shǔ jiǔ hán tiān解释数九:从冬至起,每九天为一“九”,三九、四九最寒冷。最寒冷的那些日子。近义词数九天反义词三伏天英文释义nine periods of nine days each after winter solstice, the coldest time of the year