随书附带的DVD包括了视频来演示肌肉能量技术的实际操作，来支持和完整文字内容。
The DVD-Rom includes video clips to demonstrate the application of the techniques and so supports and supplements the text.
这种风格的关键因素在于，基部的柔和色调和传统的地图要素(比如等高线和坐标线)，以及地图设计完成后要附带说明文字。
The key ingredients to this style are the soft colour palette of the base combined with the traditional map features such as contours and grid lines, and the map sheet layout complete with legend.
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