Liu, has not competed in a world championships since 2007... and was greeted warmly by athletes and coaches from other countries as he arrived at the stadium.

自从2007年之后，刘翔还没有参加过世锦赛的比赛，当他抵达体育场时，受到其它国家的运动员和教练员的热烈欢迎。

youdao

However, he has not competed since this year's Spanish Grand Prix in April, when Honda-backed Super Aguri went out of business.

BBC: Sato to test for Toro Rosso again

Ohno has not competed since 2010 nor given any indication he'll attempt a comeback.

NPR: Gabel Resigns From Committees After Abuse Claims