Notes：

Ⅰ.障碍词汇

1．signal n．信号，预兆

2．unreasonable adj.不合理的

3．prove v．证明，证实

4．performance n．表演；表现

5．have no influence on对......没有影响

6．show off炫耀

Ⅱ.长难句分析

But if it was a close match，the athlete in a red uniform was more likely to win.

分析：这是一个主从复合句。主句为the athlete in a red uniform was more likely to win，逗号前为if引导的条件状语从句；主句中的in a red uniform为介词短语作后置定语，be likely to意为"很可能......"。

翻译：但如果这是一场势均力敌的比赛，身穿红色制服的运动员更有可能获胜。