litmus คืออะไร litmus แปลว่า tornassol
tornassol คืออะไร
- A water-soluble blue powder derived from certain lichens that changes to red with increasing acidity and to blue with increasing basicity.
Um pó azul solúvel em água derivado de certos líquens que muda para vermelho com acidez crescente e para azul com crescente basicidade.