有人戏称，每个试图建立统一理论的物理学家都有一套自己的终极理论。
Indeed, cynics claim that there are as many grand unified theories as there are theoretical physicists attempting unification.
化学家研究的物质对象也不尽相同，而且不断地变化，正因为如此，有人幽默地戏称“千变万化就是化学家所从事的一切。”
The substances chemists study vary widely and are constantly changing. Because of this it has humorously been suggested that "chemistry is what chemists do."
化学家研究的物质对象也不尽相同，而且不断地变化，正因为如此，有人幽默地戏称“千变万化就是化学家所从事的一切。”
The substances chemists study vary widely and are constantly changing. Because of this it has humorously been suggested that "chemistry is what chemists do."
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