An imperfection in the crystal structure of a metal or other solid resulting from an absence of an atom or atoms in one or more layers of a crystal.是什么意思_An imperfection in the crystal structure of a metal or other solid resulting from an absence of an atom or atoms in one or more layers of a crystal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句