He is working up a sketch into a picture. 他正在把一幅速寫(xiě)加工成一幅畫(huà)。
No matter be traditional Chinese painting or canvas,be need exercise sketch and literary sketch, this is to learn to draw the mainest point. 不管是國畫(huà)還是油畫(huà)都是需要練習素描和速寫(xiě),這是學(xué)畫(huà)最基本的要點(diǎn)。