短語(yǔ)詞組短語(yǔ)weed -control activity 除草活性weed ecological control 雜草生態(tài)控制weed biological control 雜草生物防治weed chemical control 化學(xué)除草chemical weed control practices 化學(xué)除草法preemergent weed control 作物苗前雜草防治 返回 weed control