1. However, what constitutes a knowledge management product is ill-defined. 然而，哪些东西构成知识管理产品却没有正确定义。
2. The press has questioned the government's right to cite ill-defined "public interest" as an excuse for knocking down homes. 新闻媒体质疑政府使用那很难确定的“公共利益”一词的权利，及以此作为推倒房屋的理由。
3. John Koza sees the ability of evolution to work on both ill-defined and parallel problems as another of its inimitable advantages. 约翰·柯扎将进化处理两个界定不清且并行的问题的能力看作它的另一个不可仿效的优势。
