Because white dwarfs can come in a range of masses, the merger of two could result in explosions that vary somewhat in brightness.
由于白矮星的质量处在有个亿范围之内,两个星体的并合会导致亮度有些许变化的爆发。
2
It is normal for white gold jewellery to lose brightness over time, but white gold wedding rings can be maintained with rhodium plating every few years or so.
白金珠宝随着时间的流逝失去光泽是很正常的事情,但是你可以通过每隔几年将其重新镀铑来使其保持光泽。
3
So it was the brightness of silver that then came to mean pure white.