In this process, the atoms of a certain substance, such as a crystal or a gas, are excited in such a way that they produce coherent light.是什么意思_In this process, the atoms of a certain substance, such as a crystal or a gas, are excited in such a way that they produce coherent light.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句