n. the cardinal number that is the sum of eight and one
s. denoting a quantity consisting of one more than eight and one less than ten
num. 九, 九个
1. I have nine apples in my basket.
我篮子里有九个苹果。
2. The clock shows that it is nine o'clock.
时钟显示现在是九点。
3. She is nine years old and loves to play soccer.
她九岁，喜欢踢足球。