The textbook is emphasized to plant diseases and insect pests in the South of China, especially to plant diseases and insect pests in the area of middle and down stream of Yangtse river.是什么意思_The textbook is emphasized to plant diseases and insect pests in the South of China, especially to plant diseases and insect pests in the area of middle and down stream of Yangtse river.在线翻译_英语_读音_用法_例句