The worth of the discovery was not realized until a hundred years later.

直到一百年后这个发现的价值才被人们意识到。

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Few lakes in the Sierra Nevada had any trout in them until a hundred years ago.

直到一百年前，Sierra Nevada很少有湖泊存在鲑鱼。

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They were left alone until a few hundred years ago, when their homelands were invaded from the north by other Africans and from the south by Europeans.

他们一直独自生活直到到几百年前- - -那时其他的非洲人从北部、欧洲人从南部侵入了他们的家园。

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It makes sense: if you think about it, until a few hundred years ago, following the wrong leader could easily be a death sentence.

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They were left alone until a few hundred years ago, when their homelands were invaded from the north by other Africans and from the south by Europeans.

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But rare earth elements were not known to exist until a couple of hundred years ago, and only in more recent history have their unique properties been put to significant use.

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