没人吗？

plenty of research works have been performed
on PLZT ceramics with additional knowledge gained
of the structure-properties relationships related to optical
transparency.
现已有大量关于PLZT（掺镧锆钛酸铅）陶瓷的研究工作，并有了更多的与光学透明性有关的结构-性能关系的理解。