occult blood
【待翻译】o-KULT
释义:Blood present in such small amounts that it can be detected only microscopically or chemically; in the feces, a sign of intestinal bleeding (occult means “hidden”)
occult blood
【待翻译】释义:Blood present in such small amounts that it can be detected only microscopically or chemically; in the feces, a sign of intestinal bleeding (occult means “hidden”)