Here is a pretty extensive list of: naturally occurring pHindicators that include plants, household chemicals & more.
这里是一个非常广泛的清单：天然酸碱度的指标 ，包括植物，日用化工及其他。
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The pH response to temperature varied in different pH ranges of the aqueous solutions, and colors changed when acid-base indicators were added to the aqueous solution.