单语范例（未经PONS编辑处理）
However, this assertion is virtually impossible to substantiate in practice.
en.wikipedia.org Such assertions not only bring into being large cardinals of the usual sorts, but strengthen the theory on its own terms.
en.wikipedia.org The teacher may attempt to propose a hypothetical situation in which the student's assertion would seem to demand an exception.
en.wikipedia.org Her response to this assertion was that she was sworn to uphold the law, and that the death penalty was part of state law.
en.wikipedia.org No reason is given for this assertion, but the accompanying diagram makes it look like a true statement.
en.wikipedia.org