n. 补足语；其余产品；互补品（complement的复数）

n a word or phrase used to complete a grammatical construction

n a complete number or quantity

n number needed to make up a whole force

n something added to complete or embellish or make perfect

n one of a series of enzymes in the blood serum that are part of the immune response

n either of two parts that mutually complete each other

v make complete or perfect; supply what is wanting or form the complement to