A curved line indicating such a phrase; a slur.
连线表示这个乐句的弧线；
Relationship between leprosy incidence rate and time had a curved line tendency.
麻风病发病率与时间的关系是曲线相关。
In the PDF form, there could be graphic elements such as a vector image, an oblique line, and a curved line.
在PDF表单中，可以有图形元素，例如矢量图像、斜线和曲线。
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