短語(yǔ)詞組短語(yǔ)history of bt -transgenic cotton growing bt棉種植史CpTI -Bt transgenic cotton 轉(zhuǎn)bt -transgenic hybrid cotton 抗蟲(chóng)雜交棉transgenic bt cotton bt 棉;Bt棉花transgenic bt hybrid cotton 抗蟲(chóng)雜交棉transgenic bt cotton fields bt 棉田transgenic Bt -cry1Ac cotton 轉(zhuǎn)Bttransgenic bt -cry ac cotton 轉(zhuǎn)bt 返回 bt transgenic cotton