But many doctors fear that level of care cannot be maintained.

但是很多医生担心，医疗水平将难以维持。

youdao

Hence a more correct formulation has to declare: a theory cannot be maintained if it is refuted by the data of experience.

因此，一个更正确的公式应该是说：一个理论，如果被经验的事实驳倒，它就不能继续存在。

youdao

“Koreans always want to show their best image to other people, ” he notes, but when this cannot be maintained, it can lead to a desire simply to “give up”.

他注意到“韩国人总是想要向其他人展示自己最好的一面，”，但一旦这个无法做到的时候，经常会简单直接地导致“放弃”的念头。

youdao

This cannot be maintained for large distances, but would certainly take Cinderella out of the danger zone.

FORBES: Connect

Those are vital functions that cannot be maintained if hospitals develop a factory mentality across the board.

ECONOMIST: Letters

They believe the Federal Reserve has suppressed yields by artificial means, namely, a quantitative easing program that cannot be maintained indefinitely.

FORBES: Are "High" Yield Bonds At Only 7% Worth The Risk?