一个比较不明显的但是无处不在的大规模生产的服务是计算机操作系统。
A less obvious but ubiquitous mass produced service is a computer operating system.
夜视系统可将不明显的物体显现在显示萤幕上。
The night vision system shows objects that are difficult to see on a display screen.
对已经优化过的系统效果不明显，对新装的系统进行优化效果较好。
The system has been optimized not obvious effect of a face-lift system to optimize effective.
对已经优化过的系统效果不明显，对新装的系统进行优化效果较好。
The system has been optimized not obvious effect of a face-lift system to optimize effective.
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