fossil - part of a plant or animal preserved in rocks for a long period , deforestation  - cutting down of trees in a large area, pollution - damage caused to air or water by harmful substances or waste, recycling  - the process of collecting and changing paper, plastic  and glass so that they can be used again ,

Environment

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？