we woll not know ?scientists are right until the daywe land

we woll not know ?scientists are right until the daywe land we are takeing away the land and we are the land of watch we know not what is good until we have lost We are all right,Only is the time is not right这句话的中文是什么? Scientists are trying to make the deserts（沙漠） into good land "Scientists are trying to make the deserts into good land ag 阅读理解Scientists are trying to make the deserts into good land 英语翻译Scientists are trying to make the deserts into good land We are thankful for the great inventions by the scientists . we are not old as long as we are sleeking; we are not until 【高中英语】Scientists are not sure of the potiential effects __B_