If a transaction were to get stuck for some reason (too low of gas fee) a user could submit another transaction with the same nonce and a higher gas. When the transaction with the higher gas fee goes through, the other transaction cannot be completed as a nonce cannot be reused
如果某项交易因某种原因（汽油费太低）而受阻，用户可以提交另一项具有相同时间和更高汽油费的交易。当燃气费较高的交易完成时，另一笔交易无法完成，因为一笔交易不能重复使用