1. 无记名投票；无记名选举；无记名表决
    A ballot is a secret vote in which people select a candidate in an election, or express their opinion about something.

    e.g. The result of the ballot will not be known for two weeks...
           无记名投票的结果将于两周后公布。
    e.g. Fifty of its members will be elected by direct ballot.
           50名成员将通过直选产生。

2. （无记名）选票
    A ballot is a piece of paper on which you indicate your choice or opinion in a secret vote.

ballot的解释

    e.g. Election boards will count the ballots by hand...
           选举委员会将人工计票。
    e.g. They succeeded in putting Perot's name on the ballot in Florida.
           他们成功地让佩罗在佛罗里达州成为了候选人之一。

3. 在…中间进行无记名投票（或表决）
    If you ballot a group of people, you find out what they think about a subject by organizing a secret vote.

ballot的意思

    e.g. The union said they will ballot members on whether to strike.
           工会称他们将要求会员投票表决是否罢工。