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(nèi)所包含的光強(qiáng)極軸曲線上的矢徑長(zhǎng)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(fā)散。
2. It's difficult to find angular extent in a sentence. 用angular extent造句挺難的