猪大肠虽然很好吃，但是容易煮不烂，而且还会有异味，那么在家里如何煮才能煮熟、煮烂呢？猪肠煮多长时间可以熟？
I am trying to create a composite key that mimicks the set of PrimaryKeys in the built in MySQL.DB table.
加载中,请稍侯......