n.追蹤；描圖
動詞trace的現(xiàn)在分詞.
Ray tracing is a technique for creating photo-realistic images. 光線追蹤是產(chǎn)生仿真影像的技術。
But for this Art Show you just need ordinary watercolour paints and tracing paper! 但是在本節(jié)目中
v.重描；折回；追溯
