unwritten造句

They obey the one unwritten rule that binds them all—no talking.
他们都遵守着那条约束他们所有人的默认规则——要守口如瓶。

They sinned against the unwritten rules of this meeting.
他们违反了这次会议的不成文规定.

His behavior transgressed the unwritten rules of social conduct.
他的行为违反了不成文的社交规范.

A powered vessel should give way to sail—it is an unwritten rule of the sea.
机动船在遇到帆船时必须让其先行, 这是一条不成文的航海规则。

The missive remains unwritten and unsent.
这件公文未写也未发出去.