他们的发现是唯一挑战既有理论的。
Theirs are the only findings that challenge the established theory.
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theirs英 /ðeəz/|美 /ðɛrz/
解释
名词性物主代词 theirs 作主语（复数指代），与复数谓语 are 搭配，体现先行词数量决定谓语一致。
Theirs are the only findings that challenge the established theory.
名词性物主代词 theirs 作主语（复数指代），与复数谓语 are 搭配，体现先行词数量决定谓语一致。