践更

因封地临近海滨，有海盐之利，刘濞便利用流亡人口与奴录，并付给践更卒以佣费，煮海水为盐。

As his fief was near seashore , sea salt was easy to be obtained . Liu Bi applied population-in-exile and slaves to boil sea water for making salt and paid them lower commission .

在我国，实物期权思想引入时间较晚，其实践应用更是不甚广泛。

In China , the introduction of the Real Option idea is late , and the practice of the idea is not very extensive .