difficult problem of technology

• 技术难题

difficult problem of technology的用法和样例：

例句

1. The whole machine clearing in engineering overhauls is still a technical problem.
   工程机械大修时的整机清洗是国内尚未解决的技术难题。
2. The evaluation of radar antijamming performances has always been a difficult problem.
   雷达抗干扰性能评估一直是一个技术难题。