n. 一项(或条、点), 个别项目, 详细说明

a. 特别的, 独有的, 挑剔的, 详尽的

n. a fact about some part (as opposed to general)

n. (logic) a proposition that asserts something about some (but not all) members of a class

s. unique or specific to a person or thing or category

s. separate and distinct from others of the same group or category