involving change有变化的
metamorphose (= to change into a completely different form)变形;变质
metabolism (= the processes in the body that change food into energy)代谢,新陈代谢
outside the normal limits of something超出了一般的限制
metalanguage (= a specialized form of language used for describing a language)元语言(用于描述其他语言的语言或符号集)