认定的英文：
maintain
be of the firm opinion that
firmly believe

参考例句：

We take their numBer at 1,000.
我们认定他们的号码是一千

We all judge it wrong to cheat in examination.
我们都认定考试作弊是错误的。

"John Hunter, however, was sure that this was what he wanted to do."
然而约翰·亨特却认定这一行正是他要干的。

Take something for granted; take something as a matter of course
视为当然;认定事实

To declare unqualified or ineligible.
宣布不合格，认定不合适

Issues concerning determination of the qualification of tax-free scientific research institutes
免税科研机构的资格认定问题

a foundling's putative father
一般认定的该孤儿的父亲

The judge found him guilty of unpardonable evil.
法官认定他的罪行十恶不赦。

She persists in the belief/in believing that she is being persecuted.
她认定自己受到了迫害.

The threat or use of force against a law enforcement officer is not justified .
暴力对抗执法人员会被认定有罪。

maintain是什么意思：
v. 保持，维持；支持，抚养；保养，维修；坚持

maintainable adj.
可维持的；主张的

motor maintainer
自动养路机

blade maintainer
单刃养路机

firm是什么意思：
n. 商号；企业
adj. 坚定的；坚固的；强有力的；确定的；坚挺的；严格的
v. （使）坚固；变坚实；加强；使坚定；回升
adv. 坚定地

Are the firm's finances sound?
这家公司的财务状况可靠吗?

His step was not as sharp and firm.
他的脚步不再像从前那样敏捷、坚实。

To become firm or gelatinous; congeal.
凝固凝结或变硬；冻结

opinion是什么意思：
n. 意见，看法，主张；舆论

narrow opinions.
刻板的观念

You must synthesise various opinions.
你必须综合各方面的意见。

This received opinion is piously affirmed.
这个被普遍承认的观点已经得到值得嘉许的肯定。