They sighted each pole, reading off measurements that were then used to calculate the change in elevation over each increment.
他们瞄准了每个极点，读出测量值，然后用这些测量值来计算每个增量上的海拔变化。
2
Here's how the seasonal change affects the weather: Around the time of the June solstice, the North Pole is tilted toward the sun and the Northern Hemisphere is starting to enjoy summer.
季节是这样影响天气变化的：约在6月份夏至的时候，北极斜向太阳一面，北半球开始享受夏天。
3
All humans surviving the pole shift will have died, and incarnated safely elsewhere, before this climate change occurs.