How old are these? 这是多久前的

281. She has what looks like continuous seizure activity in her left foot.
     她左腿似乎有持续性痉挛症状
282. Her balance is off.
     她没有平衡感
283. Her parents have come a long way to try to find out what's wrong.
     她的父母特意赶过来查明病因
284. How old are these?
     这是多久前的
285. Three months old.
     三个月前
286. I need new ones.
     我需要新片子
287. Her brain could look dramatically different today.
     她的大脑今日看来有可能全然不同

来自《实习医生格蕾 第一季 第七集 Grey's Anatomy S01E07》第 284 行