The lineis the product of a force, it is a point on which a living force hasbeen applied in a given direction, the force applied on the pencil oron the paint brush by the hand of the artist.

• 该生产线的产品是一支部队，这是一个问题上，部队生活已适用于某一方向，部队的基础上采用铅笔或画笔的手的艺术家。