station.So the sci-|||-entists there can see the weather of any part-|||-of the world and tell how the weather will cha-|||-nge.-|||-Today. nearly five hundred weather station-|||-s in sixty countries can 3. __-|||-_satellite pictur-|||-es.4. __ they receive the new pictures, they-|||-compare(比较)them with the earlier ones.Pe-|||-rhaps they may find that the clouds have 5.-|||-during the last few hours.T his may mean-|||-that the weather on the ground may soon chan-|||-ge,too.In their next weather 6. _,they can-|||-tell people about it.So the weather satellites a-|||-re of great 7. to the scientists at the stat-|||-__-|||-ion.In the past they could forecast the weath-|||-er for about 24 or 48 hours 8. . Now they-|||-__-|||-can make good forecasts for three 9._________ive-|||-days.Soon, perhaps,they may be able to forec-|||-ast the weather 10._ a week or more ahea-|||-d.