cut down and burn a lot of trees什么意思?

cut down and burn a lot of trees什么意思? We cut down and burn billions of trees every year but we rep lots of trees were cut down and some kinds of trees () A.wer a lot of trees cut down ,this area has become desert burn down什么意思 A strong wind hit the south and blew down a lot of trees 求下列同意句转换1.People burn a lot of trees every year. We cut down and burn__(millon)of trees every years怎么填,理由又是什么 People have cut down millions and millions of trees.对画线milli cut down trees at Tina has already cut down the trees and build a house 变否定句 ——more and more trees cut down,many animals are dying out a