picric acid

例句：

1. 1. This chemical is used to dissolve metals in the laboratory.
   这种化学物质在实验室用来溶解金属。
2. 2.The chemist mixed the picric acid with the sodium carbonate.
   化学家将重铬酸盐与碳酸钠混合。
3. 3.The doctor warned us about the dangers of picric acid exposure.
   医生警告我们重铬酸盐暴露的危险。