To answer that, Wood and his team deployed audio recorders in roughly 1,000 locations throughout 2,300 square miles of the northern Sierra Nevada.

为了回答这个问题，伍德及其团队在遍布内华达山脉北部2300平方英里的近1000个地点部署了录音机。

Another of Restak's tried-and-true memory exercises simply requires a pen and paper or audio recorder.

雷斯塔克的另一项经过验证的记忆练习只需要笔和纸或录音机。