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photogun
释义
物理学词汇手册
photogun
光电子枪
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perturbation theory
perturbation theory
perturbation theory
perturbation theory
perturbation velocity potential
perturbed differential equation of motion
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perturbed motion of satellite
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pertusadina
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PERT(program evaluation and review technique)
PERT(program evaluation and review technique)
PERT (Programme Evaluation and Review Technique)
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