The commonly used stool occult blood tests rely on chemicalcolor conversions to detect microscopic amounts of blood.
常用的大便潜血试验的方法就是依靠化学色素转化来检测微量血液。
2
In fact, I find the range and variety of synthetic hair color to be an impressive testament to our unending chemical creativity.
事实上，我发现大范围各种各样的合成染发剂对永恒的化学创造力来说是有力的论证。
3
So if you found another star with a pale-blue dot tooling around that yellow star, that blue color and chemical analysis of the planet might give us a strong suggestion of life.