The circular economy is an opportunity to create value, not just reduce waste.
系统辨识是从观测到的输入输出数据中建立动态系统数学模型的科学与艺术。
我并不完美，我也不假装完美。
The speech we hear is an indication of that which we don't hear. It is a necessary avoidance, a violent, sly, anguished or mocking smokescreen which keeps the other in its place.