mark, stain, fingerprint辨析

mark, stain, fingerprint辨析
①mark：a small area of dirt or other substance on the surface of sth, especially one that spoils its appearance 污点、污迹、斑点
e.g., The kids left dirty marks all over the kitchen floor.
孩子们把厨房的地板弄得污迹斑斑。
②stain：a dirty mark on sth that is difficult to remove, especially one made by a liquid 指污点,污迹
e.g., blood stains血迹
③fingerprint：a mark on a surface made by the pattern of lines on the end of a person's finger, often used by the police to identify criminals 指指纹，指印: e.g., Her fingerprints were all over the gun.
支枪上布满了她的指纹。