It can grow as fast as one and a half inches per hour.

它能以每小时1.5英寸的速度生长。

Rainfall of more than two inches per hour is in the forecast.

预测称每小时降雨量超过2英寸。

This thing was dropping snow at a rate of two to three inches per hour.

暴雪会带来速度为每小时两到三英寸的降雪。

Rainfall rates could reach up to a whopping four inches per hour and some places could see a foot of rain.

降雨量可能高达每小时4英寸，有些地方的降雨量可能达到一英尺。

It can be two to three inches per hour.

它可以是每小时两到三英寸。