Sometimes, you might prefer to use color to represent some functional meaning without providing a text equivalent.

有时，你宁愿使用颜色而不是意思相同的文字来表示某些功能性含义。

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Then, in subsequent test runs, a human tester will not need to look at the text equivalent again unless the image or the text has changed since the last test run.

然后，在后继的测试运行中，测试人员将不需要再观察文本等价物了，除非从最近一次测试运行开始图像或文本改变了。

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For example, a machine can test whether a text equivalent is available for an image, but it cannot test the quality of the text or even determine whether the text is meaningless filler.

例如，计算机可以测试文本等价物对图像是否可用，但不能测试文本的质量或者甚至确定文本是否是无意义补白。

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For example, a machine can test whether a text equivalent is available for an image, but it cannot test the quality of the text or even determine whether the text is meaningless filler.

例如，计算机可以测试文本等价物对图像是否可用，但不能测试文本的质量或者甚至确定文本是否是无意义补白。

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