large square短语⁷⁷⁶⁰⁶ 基本例句 大方木 In order to get a 1- step rainbow hologram with large square and wide viewing field, one must place the slit at the imaging lens and use divergent waves as the reference wave and reconstruction wave. 本文论述要获得大视场、大面积的一步彩虹全息图必须把狭缝放置在成象透镜上；必须使用发散光波做参考光和再现照明光。 cnki