作业帮The surface of plastic objects breaks over time.
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 09:05:16
The surface of plastic objects breaks over time.
The surface of plastic objects breaks over time.
The surface of plastic objects breaks over time.
塑料物件的表面随着时间老化而脆裂