One explanation for the trend to more superhot fires is that the region, which usually has dry summers, has had significantly belownormal precipitation in many recent years.
对于超高温火灾增多的一种解释是,该地区夏季通常很干燥,近年来降水量明显低于正常水平。
2
The water level of the Mississippi River is already 6.5 feet belownormal.
密西西比河的水位已经比正常水位低6.5英尺。
《柯林斯英汉双解大词典》
3
Snow levels in the Sierra Nevada mountains are belownormal for the third year in a row.