Other options to restore the frescoes would have required using chemicals to remove the unwanted layer or using physical means to scrape it off.
其他修复壁画的方法可能需要使用化学物质来去除不需要的层，或者使用物理方法将其刮掉。
As these functions use stack semantics, you can layer transformations for shapes and later remove them to restore the original matrices.
由于这些函数都使用堆栈语法，所以您可以对形状应用层次转换，并在后面将它们删除，以恢复原有矩阵。
The above steps reduce the contrast slightly too much, so we restore this with another blended in grayscale layer to up the contrast but leave the colors relatively unchanged.
前一步让对比度下降的有点大了，所以咱要再一次用一个灰度图来加大一点反差，但要保持色彩关系不变。
Biological Reclamation refers to the use of biological, and other technical measures to restore soil fertility and biological productivity, and establish a stable layer of plant activities.
生物复垦是指采用生物等技术措施恢复土壤肥力和生物生产能力，建立稳定植物层的活动。
Biological Reclamation refers to the use of biological, and other technical measures to restore soil fertility and biological productivity, and establish a stable layer of plant activities.
生物复垦是指采用生物等技术措施恢复土壤肥力和生物生产能力，建立稳定植物层的活动。
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