n. 痕迹；遗迹（trace的复数）

n a just detectable amount

n an indication that something has been present

n a suggestion of some quality

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 either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree

n a visible mark (as a footprint) left by the passage of person or animal or vehicle

v follow, discover, or ascertain the course of development of something

v make a mark or lines on a surface

v to go back over again

v pursue or chase relentlessly

v discover traces of

v make one's course or travel along a path; travel or pass over, around, or along

v copy by following the lines of the original drawing on a transparent sheet placed upon it; make a tracing of

v read with difficulty