没有人修复桥梁，修复建筑物或保持发电厂。
Nobody to fix Bridges, repair buildings or maintain power plants.
不确定代词可以替代名词。他们可以让不确定的人或物表达所有人、没有人或某些人的想法。
Indefinite pronouns are words that replace nouns; they refer to an identifiable but not specified person or thing, expressing the idea of all, none, any or some.
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