Fourthly, efforts are being intensified to prevent or control hazards caused by mice, insects and poisonous weeds, and to maintain the natural ecological balance of the grassland by utilizing scientific means, and artificial and biological technologies.
英
美
- 四是運用科學(xué)手段，采取人工和生物等技術(shù)，加大對鼠害、蟲(chóng)害、毒草的預防和治理，維護草地的自然生態(tài)平衡;
