n. the cardinal number that is the sum of eleven and one
s. denoting a quantity consisting of 12 items or units
num. 十二, 十二个
1. There are twelve months in a year.
一年有十二个月。
2. I have twelve apples in my bag.
我包里有十二个苹果。
3. She will turn twelve years old next week.
她下周将满十二岁。