retardancy

例句：

1. 1. The project was delayed due to unexpected technical issues.
   由于技术问题，项目被推迟了。
2. 2.The delay in the delivery date has caused significant frustration among customers.
   交货日期的延迟给顾客带来了极大的不满。
3. 3.The scientist discovered a new method to reduce the retardancy of the material.
   科学家发现了一种新的方法来减少材料的延迟性。