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