真有象音乐那样自成一类的语言？或者说存在着除非消亡否则将永远无法彼此沟通的孤立的语言？
Does language really exist in the singular, like music, or are there only languages which must remain permanently foreign to each other, as long as they survive at all?
它在益于皮肤健康的饮食中自成一类，占有重要的一席之地。
This beverage deserves a category all its own in any article about foods for healthy skin.
至于其重要性，古菌群在最开始被认定为自成一类时，也被视为无关紧要——但是它们释放甲烷的特性现在已被纳入气候变化的考察因素。
As to importance, when originally identified as distinct, the archaea, too, were regarded as marginal-yet their methane-generating properties are now a factor in climate-change calculations.
最后，非常稀有而强大的灵能物品自成一类：神器。
Finally, psionic items exist of such rarity and power as to belong to a category of their own: artifacts.
最后，非常稀有而强大的灵能物品自成一类：神器。
Finally, psionic items exist of such rarity and power as to belong to a category of their own: artifacts.
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