diagram elements的用法和样例：
例句
- The main goal of these languages is to define precise semantics of the notational elements, resulting in an expressive graphical language.
这些语言的主要目的是定义图元的准确语义，产生一个用于表示的图形化语言。 - This method fulfills the needs of drawing vectorization accuracy and suitable for the vectorization applications of engineering drawing with minor arcs elements.
该方法完全实现了工程图元素的精确识别，特别适合包含少量非直线图元的工程图矢量化应用。
