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2013-05-23 12:21
求翻译：Then, in the nineteen nineties, researchers found a way to grow cotton plants that contain a Bt gene. The genetically modified cotton plant produces toxins that kill bollworms. Farmers around the world are now growing an estimated fourteen million hectares of Bt cotton.是什么意思？ 待解决
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- 离问题结束还有
Then, in the nineteen nineties, researchers found a way to grow cotton plants that contain a Bt gene. The genetically modified cotton plant produces toxins that kill bollworms. Farmers around the world are now growing an estimated fourteen million hectares of Bt cotton.
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