normal mechanisms

例句：

1. 1. The temperature is normal for thistime of year.
   这个季节的气温是正常的。
2. 2.The room was in a state of normalcy before the storm.
   暴风雨来临前，房间处于正常状态。
3. 3. The food was normaland delicious.
   食物正常且美味。