pure substance

• 纯物质

pure substance的用法和样例：

例句

1. It is not always easy to separate a mixture of liquids into pure substances by fractional distillation.
   用馏分蒸馏法把液体的混合物分成纯物质，不总是轻而易举的事。
2. The star indicates a property of a pure substance or a collection of pure substances.
   星号表示纯物质或纯物质集合的性质。