伦敦动物学会（Zoological Societyof London）蝙蝠专家凯特·琼斯说，“它们也是关键的指标物种，能提供有关生态系统健康状况的信息。
They are also a key indicator species that can provide information on the health of an ecosystem.
科学家们已经设定了一些主要环境指标的安全阈值，而一旦超出这些值，将会危害到地球物种的生存。
Scientists have set thresholds for key environmental processes that, if crossed, could threaten Earth's habitability.
并从指示物种，结构-功能-组成，压力-响应等方面介绍了生态系统完整性评价指标；
The indicators of ecosystem integrity can be grouped into indicator species, structure-function-composition indicators, and stress-response indicators.
物种只是一个不完整的替代指标。
在同源性方面，在进化上比较接近的物种，基因的密码子使用频率和使用偏性指标比较接近或基本相同。
Moreover, species with near homology relationship on evolution share the near codon usage frequency and preference index or the similar index.
作为植物种的重要性指标，广义多度较个体数更为合理。
As the index of value of species, the generalized abundance is more rationale than the number.
通常情况下，最好的指标是规模-男性成长物种大鳄鱼比女性来说，一个非常大的，所以个人更可能是一名男性。
Usually, the best indication is size - males grow larger than females in all crocodilian species, and so a very large individual is more likely to be a male.
以羰基价、酸价为指标，采用正交设计研究炊具、温度、时间、食物种类对煎炸过程中花生油及调和油卫生质量的影响。
The effects of cooking utensils, temperature, time and food on the quality of edible vegetable oils used in frying food were studied by orthogonal experimental design.
通过对相关指标进行统计分析，结果表明，目前北京城市建成区园林绿化中应用的乡土植物种类还不够丰富。
The results of statistical analysis of related data showed that indigenous plants applied in urban greening were not abundant in urban built-up area of Beijing at present.
通过对相关指标进行统计分析，结果表明，目前北京城市建成区园林绿化中应用的乡土植物种类还不够丰富。
The results of statistical analysis of related data showed that indigenous plants applied in urban greening were not abundant in urban built-up area of Beijing at present.
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