When he and his colleagues used a hidden stopwatch to time patients until they were finished talking, the average time was 92 seconds, although elderly patients tended to take longer.

兰格维茨和同事用秒表暗中测算患者讲完病情所用的时间，发现他们平均要用92秒，尽管老年患者所花的时间通常要多一些。

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For example, the 7-9 age group spends as many as 6 hours per week on average, while the 16-18 age group spends only half the time talking with their parents.

例如：7到9岁时，他们每周大约能和父母交谈6小时左右，但是到了16-18岁时，他们与父母交流的时间还不到到处的一半。

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For example, the 7-9 age group spends as many as 6 hours per week on average, while the 16-18 age group spends only half the time talking with their parents.

例如：7到9岁时，他们每周大约能和父母交谈6小时左右，但是到了16-18岁时，他们与父母交流的时间还不到到处的一半。

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