n. the cardinal number that is the product of ten and four
s. being ten more than thirty
num. 四十, 四十个
1. I have forty dollars in my wallet.
我的钱包里有四十美元。
2. She is turning forty next month.
她下个月将满四十岁。
3. There are forty students in our class.
我们班有四十名学生。