The concept of redundant illumination is introduced to ensure the coherent illumination of zone plate and reduce the effect of source instability and element vibration.
引入冗余照明的概念，以实现波带板的空间相干照明以及降低束线对光源不稳定性及元件振动的要求。
Speculative philosophy is the endeavour to frame a coherent, logical, necessary system of general ideas in terms of which every element of our experience can be interpreted.
思辨哲学努力构造一般概念的一致的、逻辑的、必然的体系，经验的每个要素可根据它得到解释。
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