高亮区域显示沿冰川边缘出现非常密集的冰隙。
The highlighted area shows a dense concentration of crevasses along one edge of the glacier.
应该留下一点高亮区域（如图所示） 。
This should leave you with a thin bit of highlight (as shown).
在高亮区域周围移动鼠标，直到进度条填满，生成密钥。
Move the mouse around the highlighted area until the progress bar is full to generate the key.
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