has been tumbling
The number of solar cells in the world has been doubling every two years, and their cost has been tumbling. | El número de células solares en el mundo ha doblado cada dos años, y su costo ha ido bajando vertiginosamente. |
Other Dictionaries
Explore the meaning of tumble in our family of products.
Random Word
Roll the dice and learn a new word now!
Want to Learn Spanish?
Spanish learning for everyone. For free.
