The very first true brown dwarf had been found.

第一个真正的褐矮星被发现了。

Many more such L stars were found, but still these weren't true brown dwarfs: these stars were massive enough to initiate fusion in their cores.

后来还发现了更多这样的恒星，但它们仍然不是真正的棕矮星：这些恒星的质量大到足以在其核心引发聚变。