截至昨日下午，虽然官员表示字母相同，但他们没有透露寄给白宫的信件中是否发现蓖麻毒素。
As of yesterday afternoon, officials hadn't said whether ricin was found on the letter addressed to the White House, although they did say the letters were similar.
截至昨日下午，虽然官员表示字母相同，但他们没有透露寄给白宫的信件中是否发现蓖麻毒素。
As of yesterday afternoon, officials hadn't said whether ricin was found on the letter addressed to the White House, although they did say the letters were similar.
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