the upper or lower bracket

• (淘汰赛中的)上方或是下方

the upper or lower bracket的用法和样例：

例句

1. Although Ganymede circles Jupiter once a week, it usually passes above or below the planet, so that a good eclipse occurs more rarely.
   因为木卫三的公转周期只有一周，且总是通过木星的上方或是下方，以致于难得出现掩星。