In general, the annual rainfall in these regions is less than the annual water loss by evaporation . 总的来说，这些地区的年降雨量比一年内由于蒸腾而失去的水分要少。
The adequate rainfall and sparse population permitted americans to use water and to pollute water with abandon . 充足的雨量和稀疏的人口使美国人能够随意用水和随意将水弄污。
Most of the united states east of the hundredth meridian receives a rainfall of thirty inches or more per year . 美国在子午线一百度以东的大部分工区，每年都有三十英寸以上的雨量。
Rainfall frequency and amount are thus crucial factors in determining the position of deposition in a soil profile . 降雨次数和降雨量是左右溶质在土壤剖面中沉积位置高低的决定性因素。
Aircrafts fly above and beside the storm clouds and drop tiny silver iodide crystals into them, triggering rainfall . 飞机飞行于风暴云之上及其周围，向风暴云中撒播碘化银晶粉以激发降雨。
The deformations at the surface of the crust after rainfalls have close relations to the occurrence of shallow shocks in the upper crust . 雨后地壳表面的形变与地壳上部发生的浅源地震密切相关。
The problem is that the rainfall is not regular. it is not evenly distributed, either in time of year or geographically . 问题在于雨量不规则，无论从季节上讲或地理上讲，雨量的分布都是不均匀的。
Infiltration water, the rainfall which enters the ground and becomes ground water, can travel for long horizontal distances . 渗透水，即渗入地下变成地下水的那部分雨水，能在地下做长距离的水平流动。
These phenomena indicate that heavy rainfall is a kind of trigger for the occurrence of earthquakes which occur along the fractured zones of the active faults . 这些现象表明，大雨是发生于活动断层断裂区的那些地震的一种触发因素。
