annual surface flow的用法和樣例：
例句
- The square ratio method and basin precipitation method are commended for annual runoff calculation.
在年徑流計算中，建議採用面積比法和流域雨量法。 - The relationship between the scale and the wavelength is given, and a natural annal flow time series in the upper reach of the Yellow River is analyzed.
文中給出基於尺度能量參數的子波變換中尺度與波長的關係，並且分析了一組黃河上游年徑流量數據。
