例句與造句

1. the angular extent in a specified plane which contains all the radius vectors of the polar curve of luminous intensity having lengths greater than a specified fraction of the maximum
   在某一平面上，一定角寬范圍內所包含的光強極軸曲線上的矢徑長度均大于其最大值的某一特定比例，這種情況定義為光束的發散。
2. It's difficult to find angular extent in a sentence. 用angular extent造句挺難的