How to say the number 7 in English?

The number 7 means seven in English.

Seven analysis is as follows:

First, the phonetic symbol: English? [sevn]？ ? ? Beautiful? [sevn]

Second, the significance:

Calculator? (number)

seven

Adjective? (adjective)

seven

Noun (short for noun)? (noun)

Seven (pieces)

Group of Seven

Third, word collocation:

Seven seas? Seven oceans of the world

Seven Sisters? Pleiades star cluster; Big Dipper Group ...

Seventy times seven? many

On the Seven Clouds? Very lucky?

Seven Wonders of the World? The Seven Wonders of the Ancient World

Seven-year itch scabies

Group of 77? Group of 77 ...

What a mess? in a complete mess

Seven deadly sins? Seven deadly sins (pride, greed, ...

Seven stars? Pleiades star cluster; Big Dipper Group ...

Seven Wonders of the World? Seven Wonders of the World

Fourth, examples:

There are seven continents in the world.

Four times seven equals twenty-eight.

7 times 4 equals 28.

I have seven roommates in college.

I had seven roommates when I was in college.