In the past, there weren't so many colors available, and some had particular chemical qualities that made them good to use.
在过去，可用的颜色并不多，有一些颜料的特殊化学性能决定了它们特别方便使用。
It is possible to use these devices blindly, but your program can also determine how many colors are available on the particular display device and take best advantage of the hardware.
盲目地使用这些设备是可能的，但是你的程序也可以确定多少种颜色在这个特殊显示设备上是可用的并且最好地利用硬件。
Bit depth quantifies how many unique colors are available in an image's color palette in terms of the number of 0's and 1's, or "bits," which are used to specify each color.
位深度量化有多少独特的颜色是在图像的调色板可在0和1，或“位”，这是用来指定每种颜色的数量。
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