If something stands out, it is much better or much more important than other things of the same kind.
He played the violin, and he stood out from all the other musicians…
他演奏了小提琴，把其他所有乐师都比了下去。
Many people were involved in this conspiracy, but three stand out.
很多人参与了这场阴谋，但有 3 个人是主谋。