天空灰的像哭过 All Khun ; Gray like the sky cried
图像的灰度变换 gray-scale transformation ; GST
灰度图像的ocr识别 recognition of gray scale optical character recognition
像灰的，尤指在颜色上；苍白的。
像埃里卡这样的孩子能长这么大了却不知道灰是什么，直到她看到灰从山上喷涌而出。
A child like Erica could get this far without knowing what ash was, until she saw it spewing from a mountain.
该飞机使用活塞式发动机，而不是身材庞大的喷气涡轮机，因此它不会像大型商业飞机那样受到火山灰的负面影响。
The plane uses a piston engine rather than a large-scale turbine jets, allowing it to travel unaffected through the ash, unlike large commercial jets.
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