根据生物种或它们的群体或生物体的某些特征来判断地理环境中其他成分的现象，称为生物体的指示作用。
有指示作用的人或事物 indicator
作用指示符 [图情] role indicator
指示的相互作用 Indicate interactions
日语指示词的语用作用 The Knowledge of Japanese Language
Compared with the atmospheric particles and soil, urban dust study involving special environmental information and indication effect and it is characterized with wide distribution, convenient sampling and close relation with nonpoint source pollution.
与城市大气颗粒物和土壤的研究相比,城市灰尘的研究包含特定的环境信息和指示作用,且具有分布范围广、取样方便、代表性强、与非点源污染联系紧密等独特的环境特征。
参考来源 - 金华城市灰尘重金属空间分布规律Influenced by the human activities including traffic transportation,industrial production and urban construction,etc. ,urban street dust itself accumulates a component of pollutants such as heavy metals,contains important indicator information for environment pollution,and becomes a significant source of urban environment pollution.
与城市土壤和大气颗粒物相比,城市街道灰尘是一种物质组成和来源更为复杂的环境介质,在交通运输、工业生产和城市建设等人类活动的强烈干扰影响下,包含了特定的环境信息和污染指示作用,成为城市环境污染的重要来源。
参考来源 - 西固城区街道灰尘重金属含量的分布、来源及质量评价·2,447,543篇论文数据，部分数据来源于NoteExpress
在水体污染方面具有重要的指示作用。
对这6个变量的分析表明，它们对于区别鸟类的栖息习性具有显著的指示作用。
Statistic analysis of these 6 variables showed that they could be used to well distinguish arboreal and terrestrial birds.
目的观测冷生理盐水(NS)对腋路臂丛神经阻滞定位指示作用及其成功率的影响。
Objective To observe the location indicative effect of cold normal saline (NS) in axillary brachial plexus anesthesia and its influence on blockade success rate.
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