slack hour

例句：

1. 1. During the slack hour, I often read books to relax myself.
   在空闲时间，我经常读书来放松自己。
2. 2. The teacher suggested that we take a break during the slack hour.
   老师建议我们在空闲时间休息一下。
3. 3. After work, she usually spends her slack hour watching TV.
   下班后，她通常花她的空闲时间看电视。