normal on-load operation

例句：

1. 1. The normal temperature is 98.6 degrees Fahrenheit.
   正常温度是华氏98.6度。
2. 2. He wears a normal shirt for work.
   他上班时穿一件普通的衬衫。
3. 3. This is the normal way to do it.
   这是做这件事的正常方式。