But the most reliable alternative to X-ray scanning, hand-searching everything, is slow and expensive.
但是手动搜索一切，这种替代X射线扫描的最可靠的办法慢而昂贵。
The microscopic mechanism of irradiation damage of Al film reflector is studied by the slow positron annihilation technique and X-ray diffraction.
用慢正电子湮没等分析技术研究了辐照损伤的微观机制。
"Ray Boulger at broker John Charcol says:" It took six to seven years for average property values to fall around 15% in the last recession and recovery was also slow.
低压贷款经纪公司JohnCharcol的Ray Boulger说：“上一次经济衰退中，平均房屋价格在大约六七年的时间里才下降了约15%，而且经济恢复的速度也十分缓慢。”
The rendering speed of conventional ray-casting algorithm is very slow. Anew approach is presented here to notably improve the display speed using rotate-relative messages for further processing.
光线投射算法显示速度较慢，本文在深入分析其原因的基础上，提出利用投影角度相关信息来提高旋转显示的速度。
The rendering speed of conventional ray-casting algorithm is very slow. Anew approach is presented here to notably improve the display speed using rotate-relative messages for further processing.
光线投射算法显示速度较慢，本文在深入分析其原因的基础上，提出利用投影角度相关信息来提高旋转显示的速度。
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