rule

n.

1. 規則，規定，章程，條例[C]
   It's against the rules of the school to smoke.

   吸菸是違反校規的。

2. 習慣，通例，常規[C]
   He's made it a rule to rise early.

   他已養成早起的習慣。

3. 支配，統治；統治期間[U]
4. 尺；標準[C]