- Branche: Education
- Number of terms: 3412
- Number of blossaries: 0
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Harvard University is the oldest institution of higher learning in the United States. It was established in 1636 by the Massachusetts legislature and named after its first benefactor, John Harvard. Located in Cambridge, Massachusetts, Harvard University is an Ivy League university.
两个或多个原子，它们的原子核内质子数相同，但中子数不同。例如：12C、13C 和 14C 是同一元素的同位素。同位素具有非常近似的化学属性，但通常具有不同的物理性质（12C 和 13C 是稳定的，但 14C 是具有放射性的）。
Industry:Environment
