They were nearer the level of the ancient Sumerians or of the Maya civilization of America.

他们更接近古代苏美尔人的水平，或者是美洲玛雅文化的水平。

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Some say the ancient Sumerians were the first civilization to keep fish in ponds more than four thousand years ago.

有的说，四千多年前的古代苏美尔人是最早将鱼养在水塘里的文明社会。

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Sumerians created a brilliant ancient civilization in Western Asia, which is one of the oldest civilizations of Mankind.

苏美尔人创造了光辉灿烂的古西亚文明，是人类最古老的文明之一。

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But some farmers used toxic additives as early as 4,500 years ago, when Sumerians dusted crops with sulphur to kill insects.

然而早在约4500年以前，也有农民使用有毒的添加剂，苏美尔人便将硫磺撒在作物表面以杀死虫子。

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But some farmers used toxic additives as early as 4, 500 years ago, when Sumerians dusted crops with sulphur to kill insects.

然而早在约4500年以前，也有农民使用有毒的添加剂，苏美尔人便将硫磺撒在作物表面以杀死虫子。

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But some farmers used toxic additives as early as 4, 500 years ago, when Sumerians dusted crops with sulphur to kill insects.

然而早在约4500年以前，也有农民使用有毒的添加剂，苏美尔人便将硫磺撒在作物表面以杀死虫子。

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