Homogeneous , strained epitaxial SiGe films on silicon substrates were used.在硅基板上使用了均匀、应变的外延SiGe薄膜.Backwardness in high quality epitaxial wafer has limited greatly the development of Chinese LED industry.高质量的外延片已经成为中国LED...
结束了工具匠的学徒期以后，他当上了经理。After serving his apprenticeship as a toolmaker, he became a manager.他的学徒期已满.His apprenticeship was behind him.这是一段不同寻常的学徒期.It was an unusual apprenticeship....