Green marketing seems recent, but advertising professionals grew interest in it several decades ago.

绿色营销似乎是最近才出现的，但广告专业人士几十年前就对它产生了兴趣。

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Researchers do not have a clear idea why poor children in San Jose achieved such great success several decades ago.

研究人员并不清楚为什么圣何塞的贫困儿童在几十年前取得了如此巨大的成功。

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Several decades ago, early childhood was spent playing games on the streets.

二三十年前，孩子们是在街上玩游戏度过童年的。

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"That was several decades ago, and I think there's been growth and movement, " she said.

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Modern automobile manufacturing is a very different activity than the auto manufacturing of several decades ago.

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Like many states in the US, California virtually abandoned the mentally ill several decades ago.

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