cast secret ballots
进行无记名投票
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Under highly detailed procedures, only cardinals under the age of 80 can vote in the conclave, and secret ballots can be cast once on the first day, then twice during each subsequent morning and evening session.
WSJ: Contenders in Line to be Pope
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