uncome-at-able

例句：

1. 1. The project was uncome-at-able due to budget constraints.
   由于预算限制，这个项目是无法实现的。
2. 2. The task seemed impossible until she found a solution.
   任务看起来是不可能完成的，直到她找到了解决方案。
3. 3. The scientist's discovery was an uncome-at-able breakthrough in the field of medicine.
   科学家的发现在医学领域是一个不可实现的突破。