cobalt chloride paper

例句：

1. 1. This type of paper iscommonly used in scientific experiments.
   这种纸在科学实验中常用。
2. 2. The scientist used thispaper to conduct his research.
   这位科学家用这种纸进行他的研究。
3. 3. Thepaper was made from aspecial type of cobaltchloride.
   这种纸是由一种特殊的钴氯化物制成的。