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1988～1989年,我们根据本地区的地理、农田生态等因素,对全区农田杂草种类进行了普查.现将调查情况简报如下:
From 1988 to 1989, we conducted a general survey of the weed species in our region according to the geography and farmland ecology of the area, etc. The briefing on the survey is as follows: