基本解释化學脫葉劑英汉例句雙語例句Defoliant: Chemical dust or spray applied to plants to cause their leaves to drop off prematurely.落葉劑： 落葉劑是一種化學粉劑或噴灑劑，施於植物以使樹葉提早掉落。chemical defoliant更多例句专业释义辳業科學化學脫葉劑