河砂在建築結構設計中扮演著重要的角色。不僅可以用來製作混凝土，還可以用作建築材料中的填充物和粘結劑。河砂具有良好的穩定性和可塑性，使其成為各種建築結構的理想選擇。在施工過程中，河砂還可用於土方工程和地基處理，確保建築物的穩定性和安全性。
另一方面，草坪是景觀設計中不可或缺的一部分。良好的草坪不僅美觀，還可以為城市帶來綠意盎然的氛圍。草坪的維護需要定期修剪，澆水和施肥，以確保植被茂密並且長時間保持美觀。選擇適合的草種和適當的灌溉系統，是維護草坪健康的關鍵。
河砂的應用和草坪的維護在建築和景觀設計中都起著重要作用。只有善用資源並保持綠化，才能打造出美觀和穩定的城市環境。
Keywords: River sand, Structure, Lawn
Title: The Application of River Sand in Structural Design and Lawn Maintenance Techniques
Article: River sand plays an important role in architectural structural design. It can be used to produce concrete and serve as fillers and binders in building materials. River sand possesses good stability and plasticity, making it an ideal choice for various architectural structures. During construction, river sand can also be used in earthwork engineering and foundation treatment to ensure the stability and safety of buildings.
On the other hand, lawns are an essential part of landscape design. A well-maintained lawn not only looks beautiful but also brings a lush green atmosphere to the city. Lawn maintenance requires regular mowing, watering, and fertilizing to ensure dense vegetation and long-lasting aesthetics. Choosing the right grass species and appropriate irrigation system is the key to keeping the lawn healthy.
The application of river sand and lawn maintenance play crucial roles in architectural and landscape design. Utilizing resources wisely and maintaining greenery are essential to creating a beautiful and stable urban environment.
（本文章僅就題目要求進行撰寫，不代表任何觀點或意見）
