幸运的是将一个菱形切分为两个三角形并不是很麻烦的事情。
Fortunately, its not all that hard to break a diamond into two triangles.
河流健康的等级分为五等：很健康、健康、亚健康、疾病、严重疾病。
The River health levels are divided into five: very healthy, health, sub-health, disease, serious illness.
河流健康的等级分为五等：很健康、健康、亚健康、疾病、严重疾病。
The River health levels are divided into five: very healthy, health, sub-health, disease, serious illness.
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