universal indicator

noun

1. 通用指示剂（通过颜色变化显示物质的酸碱性）
   a substance that changes colour when another substance touches it, indicating whether it is an acid or an alkali

1. The resource identifier is actually a relative Universal Resource Indicator ( URI).
   资源标识符实际上是相对于统一资源标识符（URI）的。
2. The ratio of strontium to barium is a universal indicator for distinguishing depositional environments.
   锶钡比是常用的沉积环境判别标志之一。
3. It is proved that the electrode is an excellent universal indicator electrode for organic ion-pair titration systems.
   实验证明，该电极是有机大阳&大阴离子电位滴定体系良好的通用指示电极。
4. A method for fast determining pH value of fabric is introduced in this paper, including the preparation of universal indicator, operating sequence and pH value recording, the results are compared with those of extracting method.
   介绍了织物pH值的快速测定方法，包括广泛指示剂的配制、测定方法的操作及pH值记录方法，并与萃取法进行了比较。