| 1. | Composed of micro diamonds , aluminum oxide , and silicon carbide , the isotopic distribution of these grains bore the telltale marks of their birth : ancient supernovas and red giant stars , that shone brightly and then flickered out , billions of years ago , before the birth of the solar system
由微金刚石、铝氧化物、碳化硅组成的这些微粒的同位素分布透露出它们的诞生：那些数十亿年前，在太阳系尚未诞生时，曾经闪耀并最终熄灭的古老超新星和红巨星。 |
