但是他强调说，物种是生态系统的健康指示器，对海地人民也是至关紧要。
But the species serve as health indicators for ecosystems, he stressed, which are also critically important for Haiti's people.
无数的对鸟类于研究发现了嗅觉度，在新的物种里，它们的范围从低于10%到高于30%，这是对嗅觉可靠的指示器。
Numerous studies in birds have shown the olfactory ratio, which ranges from less than 10% to more than 30% in a few species, to be a reliable indicator of the sense of smell.
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