To prevent; preclude
避免；排除在外
The snowstorm ruled out their weekly meeting.
暴风雪使他们一周一次的会议无法举行
To remove from consideration; exclude
不考虑；排除出去
The option of starting over has been ruled out.
重新开始这种选择已被排除考虑
in a regular manner according to a particular set of rules
按规则，照规矩，循规蹈矩地
stress is not predictable by rule and must be learned word by word.
重音不可按规则预测，必须逐词学习。
have it as a habit or general principle to do something
有做某事的习惯，有做某事的原则
I make it a rule never to mix business with pleasure.
我习惯于从不把工作和娱乐弄混。
the restriction of the arbitrary exercise of power by subordinating it to well-defined and established laws
法律原则；法治
a broadly accurate guide or principle, based on experience or practice rather than theory
经验法则，凭经验或实践得来的法则
(informal, humorous)used to express one's enthusiasm for the specified person or thing
(非正式，幽默 )…必胜（用于表达某人对具体的人或物的热情）
be in complete control
主宰；支配；当家
(Brit.)examine cursorily for correctness or adequacy
(英)粗略检查（是否正确或恰当）
exclude (or include) something as a possibility
排除（不排除）…的可能性
the prime minister ruled out a November election.
首相排除了11月份进行选举的可能性。
In general; for the most part
通常；总体上
As a rule, we take the bus.
通常，我乘公共汽车