tracing的中文意思、音标与词形变化

n. 描摹, 描图, 追踪 [计] 跟踪

n. the act of drawing a plan or diagram or outline n. a drawing created by superimposing a semitransparent sheet of paper on the original image and copying on it the lines of the original image n. the discovery and description of the course of development of something