indicator的中文意思、音标与词形变化

n. 指示器, 指示剂, 指标 [计] 指示器

n. a signal for attracting attention n. a device for showing the operating condition of some system n. (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction