In general, trade software also allows for defining certain transition color range. For pixel within the range, its Alpha Channel is set between 0 and 1, i. e., translucent.
专业软件一般还允许设定一定的过渡颜色范围，在这个范围之内的像素，其Alpha通道设为0到1之间，即半透明。
Spectrum Complete range of colours within the visible light, I. E. Between the wave-length of 400 nm to 700nm.
可见光内的全部色光系列。即光波在400至700纳米之间的排列。
SpEctrum: ComplEtE rangE of colours within thE visiblE light, I. E. bEtwEEn thE wavElEngth of 400 nm to 700nm.
光谱：可见光内的全部色光系列。即光波在400至700纳米之间的排列。
SpEctrum: ComplEtE rangE of colours within thE visiblE light, I. E. bEtwEEn thE wavElEngth of 400 nm to 700nm.
光谱：可见光内的全部色光系列。即光波在400至700纳米之间的排列。
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