地衣对环境污染极端敏感，可作为测试空气质素的指标。
Lichens are extremely sensitive to atmospheric pollution and can be used as indicators of air quality.
兔子是极端敏感的动物，即使是有教养的孩子的热情，对兔子来说，也是极大的压力。
Rabbits are extremely sensitive, and the enthusiasm of even a gentle toddler is too stressful for bunnies.
老鼠拥有极端敏感的鼻子和紧凑的体型，用它来取代警犬进行炸弹、生化武器和灾难幸存者的嗅探是再合适不过了。
And with their ultra-sensitive noses and compact size, rats could one day replace dogs as the go-to for sniffing out bombs, biothreats and even disaster survivors.
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