But the inaccessibility of doctors makes early detection more difficult.
但是，看医生难让早发现更加困难。
Because the modern weapon system became more and more complexity, it will lead the fault detection and maintenance more difficult, such as the fault detecting time became long and the cost increases.
由于现代武器系统复杂化程度不断扩大，使得检测和维修难度增大，比如测试时间变长、维修保障费用增加。
After water is carried in gas Wells, status of fluid flow and medium distribution become more complicated, its production performance detection will be more difficult.
气井出现载水现象后，井筒中流体的流动状态和介质分布将变得复杂，其生产动态监测更为困难。
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