Add on a pre - recorded library of hundreds of species that you can listen to in the field in a matter of seconds 附带的预先录制的上百种的鸟声库可以当即现场听，提醒你目标鸟种的声音用来和不确定的鸟种对比包括可能的变化。
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In addition to recording your own notes and experiences , you can purchase pre - recorded libraries of high - quality , professionally produced recordings on removable memory cards 为了补充你自己的记录和经验，你可以购买我们预录制的高质量的鸟鸣库，它被专业的录制在可擦写存储卡中。
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