We need to make gray sky become blue , let those birds once so sad to leave return to their homes , turn the ever so bare forest to be lushing , and help to make the air in turbidity fresh .
让灰蒙蒙的天空变得蔚蓝，让忧伤离去的小鸟回到家园，让光秃秃的森林变得茂盛，让浑浊的空气变得清新。
lushing