虽然这项技术首先在老鼠身上取得突破性进展，但是仍可以为那些因食物腐蚀或受创而失去牙齿的人获得“长出”替代物的机会铺平道路。
The breakthrough was made on mice but could pave the way for those who lose teeth to decay or injury being able to "grow" replacements.
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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