素描是一切单色画的总称，但我们所学的素描，乃主要指铅笔画、木炭条画和炭精条画。 用铅笔、木炭条、炭精条等工具画出深浅的线条、块面的层次和明暗的调子，去表现物象的体积感、空间感、距离感、重量感、质感以及物象的特征和精神面貌的素描，称做明暗法或全因素的素描，与 Sketch is a general term for all monochrome paintings, but the sketches that we have learned are mainly pencil drawings, charcoal drawings and carbon fine strips. Use pencil, charcoal, carbon fine strips and other tools to draw shades of lines, block level and light and dark tone, to show the sense of volume and sense of space, sense of distance, sense of distance, weight, texture and image of the characteristics and mental outlook Sketches called sketches or all-factor sketches, with