This special triangle design semantics comes from triangular warning sign, this triangle appearance conveyed a correct product function information which is moral warning role in the public places.
特殊的三角形外观设计语义源自三角形的警示符号，这样的三角形外观向人们传达了一种正确的产品功能信息，在公共场所寓意警示的作用。
Third part: The history proposes a piece of warning: Moral should be concerned.
第三部分：历史提出的警示：道德关怀。
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