seven

名词 seven:

1. the cardinal number that is the sum of six and one
   同义词：7, VII, sevener, heptad, septet, septenary

形容词 seven:

1. being one more than six
   同义词：7, vii

1. Four multiplied by seven is twenty-eight.
   7乘4等于28。
2. I have seven roommates in my university.
   上大学时，我有七个室友。
3. He was composing at the piano at the age of seven.
   他7岁时就会钢琴作曲。
4. Some insects produce seven or eight broods a year.
   有些昆虫一年产七八次卵。
5. There are seven continents in the world.
   世界上有七大洲。
6. Put two noughts after a seven to make seven hundred.
   在7后面加两个零成为700。
7. Two plus five is seven.
   二加五等于七。
8. Everything is at sixes and sevens in the house.
   家里现在乱七八糟。