Farm demonstration work in the south helped to fight the cotton boll weevil .
在南部的农业示范作帮助了对棉花象鼻虫的抗争。
Farm demonstration work in the South helped to fight the cotton boll weevil.
南部农场示范工作大大帮助了对棉花象鼻虫的防治。
Farm demonstration work in the South helped to fight the cotton boll weevil.
南部农场示范工作大大帮助了对棉花象鼻虫的防治。
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