X光齿槽骨丧失年平均量
yearly radiographic alveolar bone loss
大地震年平均发生率
The annual average rate of earthquake recurrence
多年平均发电量
average annual energy output
多年平均海面
multi-year mean sea level
多年平均降水量
mean annual precipitation
annual mean precipitation
多年平均降雨量
Multi-year average precipitation