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关注：1
2013-05-23 12:21
求翻译：Examine the contrast between exposed and unexposed portions of the test piece and record it in terms of grades on the grey scale.是什么意思？ 待解决
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- 离问题结束还有
Examine the contrast between exposed and unexposed portions of the test piece and record it in terms of grades on the grey scale.
问题补充： |
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