The functionalization principle and processing methods of PVC functional materials were introduced.介绍了PVC功能材料的功能化原理和加工方法.Compared to the other functional methods, post - functionalization are more widely researched and a...
Joe Bolen braved the dangerous high winds to fly there.乔·博伦顶着大风冒险飞往那里.Thousands have braved icy rain to demonstrate their support.数千人在寒冷的天气中冒雨赶来以示他们的支持。She braved death to rescue me.她冒着生命危险来救我.It was a dangerous climb, b...