authority
1.汉译：
n[u]:权力；威权；当权（地位）
n[c]:官方；当局；当权者（组织机构）
n[c]:学术权威
2.英译：
n[u]:the power or right to give orders or make decisions.
official permission or approval.
n[c]:an administrative unit of government.
n[c]:an expert whose views are taken as definitive.
3.出自2017年考研英语一阅读Text1:
First two hours, now three hours — this is how far in advance authorities are recommending people show up to catch a domestic flight, at least at some major U.S. airports with increasingly massive security lines.
最初的两个小时，现在是三个小时——这是官方建议搭乘国内航班的人应该提前到达机场的时间，至少在美国一些拥有大量安检线的主要机场是这样的。
4.例句：
It was a direct challenge to the president’s authority.
这是对主席权威的直接质疑。
She does not like anyone challenging her authority.
她不喜欢任何人挑战她的权威。
It is up to the regulating authority to put the measures into effect.
应该由管理部门落实这些措施。
The article brought her into conflict with the authorities.
这篇文章使她与当局造成冲突。
Nothing will be done because no one in authority takes the matter seriously.
什么也办不了，因为掌权的谁也不认真对待这个问题。
It was done without the principal’s authority.
做这件事未经校长批准。
She’s an authority on criminal law.
她是刑法专家。