normal visual field

例句：

1. 1. The normal temperaturefor this region is 20 degreesCelsius.
   该地区的正常温度是摄氏20度。
2. 2. She wears anormal dress for the occasion.
   她穿着一件适合场合的普通连衣裙。
3. 3. Thenormal course of events hasbeen disrupted by the storm.
   这场风暴打乱了正常事件的进程。