基本解释化学脱叶剂英汉例句双语例句Defoliant: Chemical dust or spray applied to plants to cause their leaves to drop off prematurely.落叶剂： 落叶剂是一种化学粉剂或喷洒剂，施于植物以使树叶提早掉落。chemical defoliant更多例句专业释义农业科学化学脱叶剂