token

token :

A symbolic gesture or object representing a feeling, fact, or event (e.g., a token of appreciation).

A substitute coin (metal or plastic) used in machines instead of money.

A voucher (e.g., book token, gift token) exchangeable for goods or services.

token含义丰富，这些年在各个领域被广泛应用，赋予很多特定的内涵，最近AI Token 又火了。