rule

释义

n. 惯例,规则,统治
v. 裁定,统治,支配
vi. 裁决,统治
vt. 统治

例句

1. It's against the rule to pick up the ball.
   捡球是犯规的。
2. The rule is that someone must be on duty at all times.
   按照规定，任何时候均需有人值班。