素描画 meaning in English

graphic pen

Every twig was covered with a white nap as of fur grown from the rind during the night , giving it four times its usual stoutness ; the whole bush or tree forming a staring sketch in white lines on the mournful gray of the sky and horizon
一夜之间，所有的枝条都挂上了白绒，树皮上都长出了一层白毛，它们的粗细和原先相比增加了四倍在天空和地平线惨淡的光线里，大树和灌木就像是用白色线条画的醒目的素描画。