The United States has many different kinds of climate(气候) . On the west
coast (海岸) , the temperature changes very little between summer and winter,
but the north central states(中部各州) have a very different kind of climate. In
these states, people wear light clothes during the summer, and they need heavy
wool or fur clothes in winter.
      In the southwest, the climate is quite warm during the winter, but hot in
summer.
      In the eastern part of the United States, summer temperatures are very
different from winter temperatures. Summers are usually hot, and winters are
usually cold. Spring temperatures are comfortably warm, and autumn
temperatures are quite cool.
      Years ago, people  in  the  cold  areas (地区) of the United States did not
often get vegetables and fresh fruits during the winter. Today trucks and trains
carry fruits and vegetables very quickly to all parts of the United States. In this
way , American  " send their climates" to people in other states.