短語詞組短語subwavelength focused light beam 子波長聚焦光束describe focused gaussian beam 高斯光束聚焦focused ion beam lithography 聚焦離子束光刻focused ion beam fib 聚焦離子束focused ion beam technology 聚焦離子束技術(shù)hollow focused laser beam 聚焦空心光束focused d beam laser 聚焦束激光器 返回 focused beam