Dark matter: this generally refers to "exotic" non-baryonic matter that interacts only weakly with ordinary matter.
暗物质：这一般是指“外来的”非重子物质，与普通物质只有较弱的的相互作用。
Scientists call ordinary matter "baryonic matter" because protons and neutrons are subatomic particles called baryons.
科学家把这些常见物统称为“重物质”，因为质子和中子都属于亚原子结构的重子。
If the dark matter is made mostly of MACHOs, then it is likely that baryonic matter does make up most of the mass of the universe.
如果暗物质主要由大孩子组成，那么就有可能重子物质确实组成了我们宇宙的大部分物质。
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