Liu Xiang reacts on the starting line during the first round competition.

问题描述:

Liu Xiang reacts on the starting line during the first round competition.
麻烦翻译一下这句话

按中文习惯应这样翻译这句话:刘翔在第一轮预中,一踏上起跑线,就旧伤复发而出局.
此处react on 并不是固定用法,碰巧碰在一起,实际上,on the starting line 是一体的,表示一踏上起跑线,react 在这里是不及物动词,指伤病有反应