以下为句子列表：
英文: Abstract: This article reports a study on the synthesis and propertiesis of thioethers bi-equivalent magenta couplers.Experiments carried on color negative film and color paper showed that these bi-equivalent couplers perform higher photographic activity
中文: 文摘:本文叙述硫醚类二当量品红成色剂的合成和性能研究，经彩色胶卷和彩色相纸应用试验，与四当量成色剂比较，有着更高照相活性与稳定性，并说明了与DIR品成色剂的区别。
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英文: You can overexpose color negative film by as much as four stops to increase shadow detail and reduce contrast, without damaging highlight nuances.
中文: 在彩色负片上即使过曝多达四格来增加暗部细节与减少反差也不会损失亮部的细节表现。
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