我收到一个代表“幸运”的大象雕像，在风水学里说，把它面朝光(窗)背朝门摆在屋里会给你带来繁荣。
I have received a "lucky" elephant statue that it is believed in Feng Shui that brings prosperity in house if you keep it with the face to the light (window) and his back to the door.
传统点结构光传感器将激光器和CCD传感器固定在精密背架上，限制了其测量范围。
Traditional structure light sensor fixes a laser projector and CCD sensors on its nicety back, which limits its survey area.
由于背抛光面对受光面入射光的反射，使得少子产生率和受光面表面光电压都高于单面抛光片。
Because of the reflection on the back surface the minority carrier generation and illuminated surface photovoltage of both sides polished wafer will be higher than one of single side polished wafer.
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