the cost for detaining a vessel longer than necessary, or the cost associated with holding a currency, or something of value. th longer you have it in your possession the less value it holds because it is not in use

it is that the goods or some imformation of that unloading told , it cost not only 10 days long but also money to download it

that unloading think would take 10 days unless having loaded

In this case , demurrage , means the paid you should give

好复杂，看不懂