For a few minutes he tapped the switch after each flash, on average every six seconds.
最初几分钟，每闪一次他揿一下按钮，平均每六秒钟一次。
We blink every couple seconds, which means we lose about six seconds out of every minute of viewing time.
我们过几秒就眨下眼，意味着我们每分钟的看的时间里会丢失其中的6秒。
We blink every couple seconds, which means we lose about six seconds out of every minute of viewing time.
我们过几秒就眨下眼，意味着我们每分钟的看的时间里会丢失其中的6秒。
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