[素昧平生, sù mèi píng shēngㄙㄨˋ ㄇㄟˋ ㄆㄧㄥˊ ㄕㄥ] to have never met sb before (成语 saw); entirely unacquainted; a complete stranger; not to know sb from Adam#62922
[押平声韵 / 押平聲韻, yā píng shēng yùnㄧㄚ ㄆㄧㄥˊ ㄕㄥ ㄩㄣˋ] to restrict to even tone (i.e. final rhyming syllable must be classical first or second tone 平聲|平声), See Also: 平聲, 平声
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