What Is a Polar Vortex Weather System? -...

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English. 

Learning English use a limited vocabulary and are read at a slower pace than VOA's other English broadcasts. Previously known as Special English.