不可解的

例句：

1. 1. The problem is so complex that it's unsolvable with current technology.
   这个问题太复杂了，用现有的技术是无法解决的。
2. 2.The task was too difficult for the team to complete within the given time frame.
   任务太难了，团队在给定的时间内无法完成。
3. 3.The scientist found an insoluble compound that could not be dissolved by any solvent.
   科学家发现了一种不可溶化合物，任何溶剂都无法溶解它。