citation的解释
n. 引用,引证,引用文
citation的例句
Something, especially an official award or citation, that commends.
奖品，奖状称赞的某事，特别是官方的奖品或奖状

Some dictionary writer use citation to show what word mean.
有些辞典的编纂者用引文作例证以解释词义。