optical density value的用法和樣例：
例句
- The density of developed areas in the mature urbanized district is also calculated.
計算城市化成熟區中建成區用地面積密度值。 - It is also found that the telluric heat flow value is stripped from south to the north and dispersed from east to the west.
下地殼電性結構和速度結構明顯具有縱向分層和橫向分塊的特點(diǎn)，其熱流密度值具有明顯的南北條帶性和東西分塊性。
