Glucose and fructose have the same chemicalformula but have very different properties.
葡萄糖和果糖具有相同的化学分子式但有很不同的特性。
《柯林斯英汉双解大词典》
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According to Dantus, the technique can even tell the difference between chemical isomers - chemicals with the same chemicalformula but a different arrangement of atoms.