—— 请按键盘 空白键 开始游戏 ——

Rule of 7 in research. You can find out anything if you are willing to go seven levels. If the first source you ask doesn’t know, ask them who you should ask next, and so on down the line. If you are willing to go to the 7th source, you’ll almost always get your answer.
我们生产的每一块塑料都应该有完整的生命周期规划。
作家的职责是为不能发声者发声。