cross-hatching
noun [ U ] uk/ˈkrɒs.hætʃ.ɪŋ/ us/ˈkrɑːs.hætʃ.ɪŋ/
（用两组平行线在画中表现不同光线明暗的）交叉影线
two groups of parallel lines that are drawn close together across each other, especially at an angle of 90°, on parts of a picture to show differences of light and darkness