People began to make robots about several hundred years ago.

人们开始约数百年前开始使用机器人。

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It's acknowledged that several hundred years ago Earth became much warmer.

现已承认地球在几百年前变得更暖。

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Several hundred million years ago, it was a sea here, under which there were accumulated limestone layers a few thousand meters thick.

几亿年前，这里还是一片大海，海底沉积了几千米厚的石灰岩。

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Dr Pollack has worked out how to measure the earth's temperature several hundred years ago by studying the actual heat that once made it warm.

ECONOMIST: The hole story of global warming

Duran has been a key figure in the revitalization of the African-Caribbean culture of the Garifuna, whose ancestors came from Africa to the Caribbean several hundred years ago, and settled along the coast of present-day Belize, Honduras, Nicaragua and Costa Rica.

NPR: Umalali: The 'Voice' Of The Garifuna

Rendering software that costs several thousand dollars per user just a few years ago can now be had for several hundred dollars, said Digital Domain creative director of software Doug Roble.

WSJ: Red Ink Spills Across Visual Effects Industry