The Pluto Underground undertook a mammoth letter-writing campaign.

冥王星地下小组进行了大量书信提议活动。

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Thus far, the accusations have taken the form of an online letter-writing campaign, not a legal battle.

时至今日，所谓的控告职责引发了一场不合法理的网上信件攻击。

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In the following years, she started a large letter-writing campaign to establish an official holiday for all mothers.

尔后几年，她开启一场大型的写信请愿活动，希望能建立一个给所有母亲的正式节日。

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Lifelong fan Ann Hughes started a letter-writing campaign to secure a knighthood for Tom around four years ago.

BBC: NEWS | UK | Wales | Arise Sir Tom, the Voice of Ponty

She hired a lobbyist who helped unite various SMA patient groups, including FightSMA, in a letter-writing campaign to Congress.

FORBES: Companies, People, Ideas

He said when gay officers had first tried to start their own organisation, there was a "vociferous" letter-writing campaign against it.

BBC: NEWS | UK | England | London | Modernising gay officer gets MBE