As fall turns into winter, other changes take place.
秋去冬来，其他变化也会发生。
2
Their legs lock in place so they don't fall over.
它们的腿固定在原地，这样它们就不会摔倒。
3
The goal was to measure the AU; then, knowing the orbital speeds of all the other planets around the Sun, the scale of the Solar System would fall into place.