The Ethereum protocol stipulates that transactions sent to a network by an account are sequentially numbered, with no gaps.
Each number in the sequence is called a “nonce” and is part of the transaction payload that needs to be signed.
以太坊协议规定，账户发送到网络的交易按顺序编号，没有间隔。
序列中的每个数字都称为“nonce”，是需要签名的交易有效负载的一部分。