psd的意思是屏蔽门。
双语例句：
1.The effect of PSD on the measuring system is analyzed.分析了位置敏感探测器PSD特性对测量系统的影响。
2.Theory analysis and test research of Chinese main track irregularities PSD我国干线轨道谱理论分析及试验研究
3.The design of PSD, s treatment circuit based on numerical calculation基于数字运算的PSD调理电路设计
4.The Design of the Electronic Let-Off Control System Based on PSD电子送经系统控制器的设计
5.The Control System of Piezoelectric Micro Driving Based on Neural PSD基于单神经元PSD压电微驱动系统控制的研究
6.Design of the high precision laser alignment system with PSD基于PSD的高精度激光校准仪的设计
7.A Discussion on the Device and Technical Problems of PSD Position Measurement SystemPSD位置测量系统的实现及技术问题探讨
8.A Single-neuron PSD Control System for Complex Large Scale Time Delay System复杂大时滞系统的单神经元PSD控制
9.Experimental Study on Position Precision of Two Dimensional PSD on the Plane二维PSD在测量物体平面位置的实验研究