数目nine

• 九天

  nine days

• 九岁的男孩

  nine-year-old boy

• 九个孩子

  nine children

• 九架飞机

  nine planes

• 九个人一起

  nine people together

• 九九八十一。

  Nine times nine is eighty-one.

顺序ninth

• 九路无轨电车

  number nine trolleybus

• 九点半

  nine thirty

指冬至后的每九天each of the nine nine-day periods beginning from the day after the winter solstice

• 冷在三九。

  It's coldest during the third nine-day period after the winter solstice.

• 九尽寒尽。

  By the end of the ninth nine-day period after the winter solstice, winter has ended.

多次；多数many; numerous