The whole activity lasted for two hours, and all the participants in the activity experienced happiness and harvest.

整场枪战持续了大约两个小时，参与活动的老师和同学无不释放热情、收获快乐。

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That was followed by a period of even lower sunspot activity that lasted 90 years from 1460 to 1550 known as the Sporer Minimum.

FORBES: To The Horror Of Global Warming Alarmists, Global Cooling Is Here

The Little Ice Age, following the historically warm temperatures of the Medieval Warm Period, which lasted from about AD 950 to 1250, has been attributed to natural cycles in solar activity, particularly sunspots.

FORBES: To The Horror Of Global Warming Alarmists, Global Cooling Is Here