What is the status and function of American football?

There are three main groups: attack group, defense group and special group. The same team has only one group of games, and three groups will not play at the same time, so there are many positions for players.

Attack group

The order of attack lines from left to right is: left tackle, LT, left back, LG, center (C) and right back. RG) and right tackle, RT). Plus the most important quarterback, QB), receiver, WR), running back, RB) and winger (tight end, TE).

National defense group

Defensive end (DE), defensive tackle (DT), nose tackle (NT), inside guard, ILB), outside guard, OLB, center guard, MLB), defensive guard (DB), corner guard, CB), strong security, SS), free security, FS), etc.

Special group

Kicker (p), kicker (k), long snaper(LS), Set player (Holder, h), kicker (KR), kicker (PR) and gunner, g (I don't know their Chinese names, sorry.

Some of the above positions can be held by one person.