问两个英语单词的意思和区别certifycertificatecertificationcertified certificated这几个词分别是什么意思.特别是certify 与certificate 两个作动词的区别特别是certification 与 certificate 两个作名词的区别还有就是certified 与 certificated 两个作形容词的区别

certify
to testify usually formally and in writing to the truth or genuineness of sth.
强调验证某个事物的真实性,比如验证学历是不是真的
certificate
to testify to or authorize by a certificate
强调验证某事物是不是符合某种要求,比如这个奶粉的质量是不是符合国家标准.
certification
the act of certifying; a certified statement
证明符合XXX的凭证
certificate
a document containing a certified statement,especially as to the truth of sth,especially a document ceritifying that one has fulfulled the requirements of
凭证,特别是证明某事物能够达到特定要求的凭证
也可指产权证明,债务证明
certified
having earned cerfication,genuine
真的,品质真实
certificated
officially documented
官方认证过的