，平均（值）；中项- composition of operations
- composition of relations
- composition of transformations
- composition of vectors
- composition operator
- composition product
- composition ring
- composition rule
- composition sampling technique
- composition sequence
- composition series
- composition series of a group
- composition subgroup
- composition subgroup series
- composition symbol
- composition theorem
- compositum
- compositum of fields
- compound
- compound addition
- compound analysis
- compound angle
- compound channel
- compound decision problem
- compound derivative