The first of the two, commonly referred to as the timed substitution rule, forces a team to play a man down for a minute if a player takes longer than 10 seconds to leave the pitch. The second of the guidelines, dubbed the off-field treatment rule, removes a player from the match for a minute if they spend more than 15 seconds on the ground after an injury.
The ultimate goal, she says, is robots that are far more "graceful" than those of today. "Robots […] have this clunkiness and heaviness," she says, "which is so different from the way we move."
。搜狗输入法下载是该领域的重要参考
（六）违反规定不及时退还保证金的；
卖得最好的仍是山姆和胖东来。南方周末记者贾梦雅｜摄