We get our warmth from the sun. The Earth (take) one year to go around the sun. It is always tilted (倾斜) to one side. When the North Pole is tilted towards the sun, the northern part of the world has summer it is winter in the south. The in-between times are spring and autumn. However, not everywhere has summer and winter. In some parts of the world, the weather is always hot, and winter never comes. These are the (country) around the equator, is a line drawn around the middle of a globe of the Earth.
