要么是伦斯顿的学生接触了更多的化学物质，要么是他们比十年前的学生对这些物质更敏感。
Either Renston's schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.
该文以碳粉掺杂的聚合物为敏感膜，以叉指电极为基底制作了测定挥发性有机气体的化学阻抗传感器。
A chemiresistor sensor was fabricated for the analysis of volatile organic compounds(VOCs) with carbon black(CB)-polymer composite as sensing film and interdigital electrodes.
蟾蜍和其他两栖动物对环境化学的变化非常敏感，我认为它们应该能够感知到这些气体和带电粒子。
Toads and amphibians are very sensitive to changes in environmentalchemistry and I think these gases and charged particles could have beendetected by the toads.
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