测得的值与梯尺的尺度值比力，调动RIP洋的灰度变换弧线。
The value of the measured and wedges comparison of standard values, adjust the gray-scale transform in the RIP.
暗调图片上的色调差不多全在色调梯尺的黑色部份，白色只占很少面积。
A low key picture is almost entirely at the dark end of the tonal scale, and there are only small areas of light tone.
纽约消防队的消防梯只能到达六楼，离发生火灾的楼层还有30英尺（9米）远。
The New York fire brigade's ladders only reached the sixth storey, 30 feet (9 metres) short of the burning floors.
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