normal fence diagrams

例句：

1. 1. The normal temperature for this region is 20 degrees Celsius.
   该地区的正常温度是20摄氏度。
2. 2.He wore a normal shirt and tie for the occasion.
   他穿着一件普通的衬衫和领带出席了这个场合。
3. 3. The normal course of events has been disrupted by the storm.
   这场暴风雨打乱了正常事件的进程。