Sf, mostly shorthand. For example, in Chinese, pinyin is abbreviated as private service, that is, private service and sofa, referred to as master. There are also some abbreviations commonly used in English for SF, such as small forward. Short for engineering science.

SF = Sci Fiction(Sci-Fi), (Sci Fiction, including science fiction and fantasy, mainly describes the imagination of science (or technology) to society or personal influence. Chinese was first translated into "science fiction". Abbreviated title of). Originally, it was a style of telling stories with the future time and space as the background. Starting from mary shelley's Frankenstein, it has become an independent school with detached imagination and strange future. This meaning has always been used in animation, and after more than 40 years of development, it has gradually formed a unique animation faction.

SF = serum ferritin, which is iron in blood. It is the most sensitive index to check the iron deficiency in the body. The determination of serum ferritin is often used to diagnose iron deficiency anemia in clinic.