单位
unit (of measure); unit (group of people as a whole); work unit (place of employment, esp. in the PRC prior to economic reform); CL:個|个[ge4]
单位元
identity element (math.)
单位犯罪
crime committed by an organization
单味药
medicine made from a single herb; drug made from a single substance
淡尾鹟莺
(bird species of China) Alström's warbler (Seicercus soror)
国际单位制
International System of Units