Negotiations are a two-way thing - both sides have to come to a compromise.

谈判是一件双向的事情，双方都必须有一定让步（妥 协）。

Unlike national law, international law doesn't have just one country making rules; lots of countries are involved, which means they take time to come to a compromise agreement.

与国家法律不同，国际法不只一个国家制定规则，很多国家都参与其中，这意味着他们需要时间来达成妥协协议。