It's just a sign of the times that many children have mobile phones.许多孩子都有手机，这只是个时代特征。Having metal detectors in schools is a sign of the times.学校里配备金属探测器是时下流行的做法。It's a sign of the times when sports stars earn more than movie stars.体育明星收入超过电影明星，这是时代的标志。These riots are a sign of the times.这些骚乱是这个时代的一个写照。