We're nearing the peak of the 11-year solar cycle, so double-check your GPS and watch where you're going.
我们正在接近每11年太阳活动周期的顶峰，所以请重新检查你的GPS，注意你的去向。
Three times in the past the regular 11-year solar cycle has gone on an extended vacation - at the same time as cool periods on Earth.
每11年为一个周期的太阳黑子活动曾有三次未如期而至，而这三次都导致地球气候的变冷。
The calendars that were developed at the lower latitudes were influenced more by the lunar cycle than by the solar year.
在低纬度地区制定的历法受月球周期的影响比受太阳年的影响更大。
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