它不会在地球上散播神经毒性汞；它不会用烟尘和硫堵塞城市空气和呼吸者的肺。
It does not distribute neurotoxic mercury around the planet; it does not clog city air and the lungs of those who breathe it with soot and sulfur.
在非呼吸者世界的动物种类根本上不同于那些大气行星设计的动物。
On the nonbreathing worlds the animal species are radically unlike those found on the atmospheric planets.
鉴于许多有毒物质都是苦味的，所以研究者们以为肺部的肌肉在遇到苦味时会收紧和收缩，从而使得呼吸者远离那些有可能有毒的苦味物质。
Many toxic compounds are bitter, so the researchers expected the lung muscle to tense up and contract—to compel the breather to move away from whatever was bitter and perhaps toxic.
鉴于许多有毒物质都是苦味的，所以研究者们以为肺部的肌肉在遇到苦味时会收紧和收缩，从而使得呼吸者远离那些有可能有毒的苦味物质。
Many toxic compounds are bitter, so the researchers expected the lung muscle to tense up and contract—to compel the breather to move away from whatever was bitter and perhaps toxic.
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